Similar Triangles & Trig
Are the following triangles similar? if so, state the reason and the scale factor: Triangle ABC is a right triangle: it's legs are 6cm and 8 cm. Triangle DEF is a right triangle: It's legs are 18cm and 24cm.
What is Yes. By SAS, since the right angle is between the two legs and the legs of the triangles have a scale factor of 3.
Which of the following is NOT a way to prove triangles congruent: *NOTE* it is okay to have more than one choice for your answer. SSS SSA AA SAS AAS HL
What is SSA and AA.
Convert the following equation between rational and radical form: (3x)^2/4
What is The fourth root of 3x^2
Assume the population of a school is 1000. If a student is randomly selected, the chance that this randomly selected student is male is .47. What is the number of females enrolled in this school?
What is 530 females
A square with points A (-3,3), B (-3,6), C (-6,3), D (-6,6) is reflected across the x-axis. What are the points of the image of this square?
What is A'(-3,-3) B'(-3,-6) C'(-6,-3) D'(-6,-6)
The length of a rectangular prism is 4sqrt(3) units. The height is 3sqrt(6) units. If the volume is irrational, which could be the measure of the width of the rectangular prism? A 2(sqrt)50 B 4(sqrt)12 C 5(sqrt) 8 D 7(sqrt)18
What is B) 4(sqrt)12
True or false: In probability, "and" means add and "or" means multiply.
What is False! It's the other way around!
A ship is anchored to a seabed. We know that the rope anchoring the boat is 30 m long, and the angle where the rope meets the seabed is 39 degrees. Use the correct trig identity to find out how deep we would need to go to reach the seabed is. *HINT*- draw a picture!
What is Use sin(39) = x/30 Answer: 18.88 m deep
A picture has a height that is 4/3 its width. It is to be enlarged to have an area of 192 square inches. What will be the dimensions of the enlargement?
What is Let "w" stand for the width of the picture. The height h is 4/3 the width, so h = (4/3)w. Then the area is A = hw = [(4/3)w][w] = (4/3)w2 = 192. I need to solve this "area" equation for the value of the width, and then back-solve to find the value of the height.
Since I can't have a negative width, I can ignore the "w = –12" solution. Then the width must be 12 and the height is h = (4/3)(12) = 16.
The enlargement will be 12 inches by 16 inches
Separate the following angle relationship pairs into two categories: Those which are congruent and those which are supplementary. Corresponding, Alternate exterior, Vertical, Same side interior, Same side exterior, Alternate interior, and Linear pair.
What is Congruent: Corresponding, Vertical, Alternate exterior, Alternate interior
What is Supplementary: Same side exterior, Same side interior, Linear pair
The graph of f(x) = 2x2 – 3x + 5 will be translated 8 units down, producing the graph of q(x). Which equation represents the new function, q(x)?
A q(x) = 2x^2 – 3x – 3
B q(x) = 2x^2 – 11x + 5
C q(x) = 2x^2 – 3x + 13
D q(x) = 2x^2 + 5x + 5
What is A) q(x) = 2x^2-3x-3
A cube number 1-6 is rolled three times. What are the chances that the cube lands on 2 all three times?
What is .004, less than one percent chance!
A ladder is leaning up against the wall of a building. The angle where the ladder meets the ground is 30 degrees. If we know the bottom of the ladder is 15 feet off the wall, what is the length of the ladder? *HINT* - use trig identities and draw a picture
What is *SPECIAL TRIANGLE* 30-60-90 ladder length = hypotenuse = 30
The flight of a rocket launched in the air can be modeled by the function f(t) = 2t^2 -7t -3 where t is time in seconds and f(t) is height (in feet) of the rocket. How many seconds will it take for the rocket to return to the ground?
What is 3.89 seconds
A triangle with vertices (2,-2), (-5,3) and (3,6) will be rotated 90 degrees clockwise around the origin and then reflected across the y-axis producing a triangle image. Which additional transformation will map the triangle back to it's original points?
A rotation 270° counterclockwise around the origin B rotation 180° counterclockwise around the origin C reflection across the line y = –x
D reflection across the line y = x
What is D) reflection across the line y = x.
Describe the intervals of increasing and intervals of decreasing for the function -x^2 + 10
What is increasing from (-infinity to 10) decreasing from (10 to infinity)
Suppose you are renting a car. The chance that the car selected for you is a sedan is .48. The chance that this car is red is .30. The chance that your car is both a sedan and red is .12. If you are told ahead of time that your car is a sedan, what is the chance that you also get a red car? *HINT* probability of a given b.
What is conditional probability! Probability of both/ probability of b .12/.30 = .4 There is a forty percent chance of this.
From a point on the ground 47 feet from the foot of a tree, the angle of elevation of the top of the tree is 35º. Find the height of the tree to the nearest foot. *HINT*- use trig ratios and draw a picture.
What is 33 ft?
Given: Triangle QSR and triangle TSR are right triangles, QS is congruent to TS Prove: Triangle QSR is congruent to triangle TSR *HINT*- draw it out!
Statements: Reasons:
1. Triangle QSR and triangle TSR 1. are right triangles 2.
2. 2.Given
3. 3. Reflexive property
4. Angle QRS is congruent to 4. All right angles are angle TSR congruent
5. 5. HL
What is Statements: Reasons: 2. QS is congruent to TS 1. Given 3. SR is congruent to SR 5. Triangle QSR is congruent to triangle TSR
Sketch/Describe a graph to demonstrate the following inequality: -b^2 + 8b - 10 > 0
What is U shaped graph with zeros at 1.55 and 6.45. Graph should be shaded between the two zeros.
Cassie is worried about her upcoming exams. She predicts that there is a 95 percent chance she will pass her Math 2 exam, and a 70 percent chance she will pass her World History Exam. 1. What is the probability Cassie passes both her exams? 2. What is the probability Cassie passes at least one of her exams?
What is 1. .665 2. .985