Area
How do you find the area of a rectangle?
A = L X W
Area = length x width
How do you find the perimeter of a rectangle?
Perimeter = L+L+W+W
What type of angle would measure 90 degrees?
right angle
What is a right angle
an angle of 90°
Layla decomposed a 360˚ angle into 6 equal angles. What is the measure of one of the angles?
60 degrees
360 ÷ 6 = 60
What is the area of a rectangle that has a length of 4 inches and a width of 12 inches?
48 square inches
A=LXW
A=4X12
A=48 square inches
What is the perimeter of a rectangle with a width of 6 inches and a length of 15 inches?
6 + 6 +15 + 15 = 42 inches
Perimeter = L+L+W+W
What type of angle would measure 77 degrees?
acute angle
What is an acute angle
An angle that is less than 90 degrees
Julie decomposed a 360˚ angle into 8 equal angles. What is the measure of one of the angles?
45 degrees
360 ÷ 8 = 45
What is the area of a square that has a length of 8 centimeters?
64 square centimeters
All the sides of a square are the same length.
Area = Length X Width
8 X 8 = 64
The perimeter of a rectangle is 42 centimeters and its length is 13 centimeters. What is the width of the rectangle?
8 centimeters
Perimeter = add all your sides
42 = 13+13 + W+W
42= 26+W+W
Subtract 26 from 42
42-26 =16
Divide 16 by 2 (you have two sides)
= 8
Check your work: 13+13+8+8
What type of angle would measure 110 degrees?
Obtuse angle
What is a straight angle
An angle that is 180 degrees
The angle turns through 2/10 of a circle. What is the measure of the angle?
Hint:
Step 1: Write the fraction
Step 2: A circle is 360 degrees so
360 ÷ denominator
Step 3: Multiply your answer by the numerator
360 ÷ 10 = 36
36 x 2 =72 degrees
The measurement of the angle is 72 degrees
What is the width of a room if the length is 12 feet and the area is 108 square feet?
Hint: Remember to use the inverse operation
9 feet
Area = Length X Width
108 = 12 X Width
108 ÷ 12 = 9
A rectangle has a width of 5 centimeters and an area of 35 square centimeters. What is the perimeter of the rectangle?
Step 1: Draw a model
Step 2: Fill in the information you know
Step 3: Write the equation for the area or perimeter
Step 4:Use the inverse operation to solve for the unknown side
Step 5: Solve for the question
The perimeter is 24 centimeters
Area = Length x Width
35 = 5 x L
35 ÷ 5 = 7 ( Length is 7)
Perimeter = Add all sides
24 = 5 + 5 + 7 + 7
What type of angle would measure 179 degrees?
Obtuse angle
What is an obtuse angle
An angle that is greater than 90 degrees but less than 180 degrees
The angle turns through 4/18 of a circle. What is the measure of the angle?
80 degrees
360 ÷ 18 = 20
20 x 4 = 80
The perimeter of a rectangle is 58 inches. Its length is 14 inches?
What is the width of the rectangle?
What is the area?
Perimeter: L +L + W + W
58= 14+14+W+W
58=28+W+W
58-28 = W+W
30=W+W
30/2 = W
15=W
Area = LxW
A=14X15
A = 210
A rectangle has an area of 176 square feet. Its Length is 8 feet.
What is the width of the rectangle?
What is the perimeter of the rectangle?
Width: 22 feet
A=L x W
176 = 8 x W
176/8 = W
W=22
Perimeter: 60 feet
P= L+L+W+W
P= 8+8+22+22
P=16+44
P=60
What type of angle would measure 220 degrees?
Reflex angle
What is a reflex angle
An angle that is more than 180 degrees and less than 360 degrees
Jocelyn cut a round pie into 9 equal pieces. Seven pieces were eaten. What is the angle measure of the pie that was left?
80 degrees
360 ÷ 9 = 40
9 - 7 = 2
40 x 2 = 80