Types of Angles
A 30 degree angle is what type of angle?
A) Obtuse
B) Straight
C) Acute
D) Right
C) Acute
An acute angle is less than 90 degrees.
A straight angle is divided into 2 angles. One of the angles measures 85 degrees. What is the measurement of the other angle?
180 - 85 = 95 degrees
Draw and label a rectangle that has a perimeter of 18 inches.
Possible answers:
L = 5, W = 4
L = 6, W = 3
L = 7, W = 2
L = 8, W = 1
Area = Length x Width
Angle ABC has a measurement of 180 degrees. What type of angle is it?
Straight Angle
What type of angle would have a measurement of 108 degrees?
Obtuse
A circular pizza is cut into 9 slices. What is the angle measure of each slice?
360 degrees divided by 9 slices = 40 degrees
A square has a side length of 18 cm. What is the perimeter?
18 + 18 + 18 + 18 = 72 cm
Find the area of a rectangle that has a length of 10 ft and a width of 4 feet.
40 square feet
Draw and label an Obtuse Angle.
Angle angle greater that 90 degrees and less than 180 degrees.
Acute Angle = AEB, BEA, BEC, or CEB
Right Angle = CED or CEA
Obtuse Angle = BED
How many 30 degree angles can fit in a straight angle?
6, a straight angle is 180 degrees.
30 degrees x 6 = 180 degrees
A square has a side length of 275 cm, what is the perimeter?
275 + 275 + 275 + 275 = 1,100 cm
Area = 9 x 3
Area = 27
Which of these statements is true?
A) A right angle always has the same measurement.
B) An obtuse angle could be 183 degrees.
C) A square has one right angle.
D) A straight angle measures 360 degrees.
A) A right angle always has the same measurement
90 DEGREES!
Question #1 in your textbook
It is obtuse, so look at the larger number on the protractor.
Answer = 135 degrees
#19 in your textbook
White Board Drawing
#22 in your textbook
Answer = C, 42
To solve: 108 divided by 9 to find length. Length = 12. Now, find the perimeter.
P = 12 + 12 + 9 + 9 = 42
A square has a length of 9 in. What is the area?
9 x 9 = 81 in
What measurements can a reflex angle have?
Anything between 181 degrees to 359 degrees
Question #10 in your textbook
A) 90 degrees
B) 120 degrees
C) 60 degrees
D) 50 degree
B) 120 degrees
Think, 90 degree would be a perfect L, like 3:00. Since we know the degree is greater than 90 degrees (right angle) it could only be B.
Part A = 85 + 40 = 125 degrees = YXW
Part B = 90 - 45 = 45 degrees
#13 in your textbook
#5 in your textbook
Draw and label 3 rectangles that have a perimeter of 30 cm and find their areas.
Possible answers:
L = 4, W = 11
L = 5, W = 10
L = 6, W = 9
L = 7, W = 8