Triangles
More triangles YAY
45-45-90 Triangles
30-60-90 Triangles
Algebra
100
A triangle with all equal sides is a(n)
a. equilateral triangle
b. isosceles triangle
c. scalene triangle
a. equilateral triangle
100
What is a triangle with angles more than 90 degrees?
a. scalene
b. obtuse
c. acute
b. obtuse
100
In the 30-60-90 triangle below, if x = 4√3, what is side "B" (bottom side)?
4*3 = 12
100
Label the 30-60-90 triangle, x, 2x, 
a = x
b =
c = 2x
100
Solve for x: x2 + 6x = 7 a. 4 b. -1 c. 7 d. -7
d. -7 (also +1)
200
Interior angles are ________ the triangle and add up to _______.
a. inside 180o
b. outside 180o
c. inside 360o
d. outside 360o
a. inside 180o
200
A triangle with no equal sides is a __________ triangle.
a. isosceles
b. right
c. scalene
c. scalene
200
o"Picture" What is x?
30o
200
Find x (not y)
200
Solve for x: x/3 = 12/x a. 4 b. 6 c. 18 d. -4
b. x = 6
cross multiply: x2 = 36 --> x = 6
300
If a triangle has one angle equal to 35 degrees, another equal to 105 degrees Find the missing angle of the triangle
a. 180o
b. 32o
c. 40o
d. 220o
c. 40o
300
Find the missing angle (Picture)
a. 20
b. 63
c. 15
b. 63
300
What is the hypotenuse? (x)
16
300
Find the a
a = 1/2 of hypotenuse = 7
300
Solve for x: 1/3x + 15= 27 a. 4 b. 36 c. 14
b. 36
400
Name the exterior angle (Picture)
d
400
"Picture" Name the shortest side
t
400
"Picture" What is x?
10 It's a 3-4-5 triangle.
400
"Picture" What is the adjacent side? (x)
400
Solve for x: 4(x+3) + 2=15 a. 1/4 b. 1/2 c. 1/5
a. 1/4
500
Name of the the longest side of a right triangle
hypotenus
500
Find the missing angle.
a. 12
b. 20
c. 105
c. 105
500
Use the Pythagorean Theorem to find the length of leg "y". (HINT: not an integer.)
y = √80 = 4√5 ~ 8.94
500
"Picture" What are the legs? (all of them)
since the hypotenuse is 4
y = 2
x = 
500
Solve for x: 4(x +6)=2(x + 7) a. -3 b. -5 c. -4
b. -5