Triangle Area
A triangle has a base of 12ft, and a height of 6ft. The sides of the triangle measure 4ft and 8ft. What is the area of the triangle?
36ft2
Alex and David both measured a parallelogram. Alex said that they have to multiply the base and height. David said that they have to cut the area in half after that. Who is right?
Alex
A triangle with two congruent sides has one angle that measures 52. What are possible measures of the other two angles?
a. 52 and 64
b. 52 and 52
c. 64 and 64
d. 58 and 70
c
If the lengths of two sides of a triangle are 5 and 7, the length of the third side is NOT
a. 12
b. 7
c. 3
d. 5
a. 12
Explain the steps to solving the area of a trapezoid in complete sentences.
teacher
A = 1/2(12)(5)
What is the area of a piece of paper that is 8.5 inches wide and 12 inches long?
102 in
Two angles of a triangle have measures with a sum of 84° degrees. What is the measure of the third angle of the triangle?
12 degrees
If two sides of a triangle are 1 and 3, the third side may be:
a. 5
b. 2
c. 3
d. 4
a
The area of a rectangular sign is 51 square feet. The base of the sign is 6 feet. What is the height of the sign?
8.5 ft
For an art project, Ashely wants to paint a triangle board with the color red. The board has a base of 54cm and a height of 8cm. Should she use perimeter or area? And how much paint should she use?
area, 216
What is the area of a trapezoid with base lengths 8 in and 10 in and a height of 9 in?
81
A sticker is in the shape of a triangle. It has a right angle. What could be the measures of the other two angles?
a. 23 and 60
b. 48 and 42
c. 37 and 55
d. 12 and 68
B
Which of the following could be the lengths of the sides of a triangle?
a. 3, 10, and 15
b. 3, 1, and 2
c. 11, 9, and 20
d. 10, 4, and 12
d
Marcie is running for class president. She designed some of her campaign posters on a 27-inch by 36-inch poster board. She divided the poster board into 4 equal parts as shown below. What is the area of one of the parts of the poster board?
234 inches
A triangle has a base of 2.2yd and a height of 2.7yd. What is the area of the triangle?
2.97yd2
The back of Diego's car window is shaped like a trapezoid. The bottom is 50 inches across and the top is 45 inches across. The window is 24 inches from the top to bottom. What is the area of the window?
a. 570in2
b. 862 1/2 in2
c. 1140 in2
d. 2280 in2
c
Triangle RST is measured. Angle R measures 52 degrees. Which of the following could be the measures of angle S and angle T?
a. 58 and 59
b. 64 and 60
c. 71 and 58
d. 63 and 65
d
Which of the following lengths could become a triangle?
a. 1m, 1m, 2m
b. 3m, 4m, 5m
c. 1m, 2m, 5m
d. 2m, 4m, 8m
b
A rectangle has side lengths of 9.2 inches, 20 inches, 9.2 inches, and 20 inches. Which equation can be used to find the area of the rectangle?
A. A = (20)(9.2)
B. A = (9.2)(9.2)
C. A = 20 * 20
D. A = 1/2(20+ 9.2)
A
A triangle has a base of 3 1/2 feet and a height of 6 1/4 feet. What is the area?
43.75ft
The width of a rectangle is 23 meters long. What is the length of the rectangle if the area is 456.8 meters squared? (Round to the nearest hundredths)
19.86 m
Mark is choosing wooden sticks to make a triangular shape for a project. He can choose from six different lengths. Which of the following combinations could Mark use to make the triangle?
a. 4 in., 5 in., 11 in.
b. 4 in., 5 in., 10 in.
c. 5 in., 7 in., 11 in.
d. 2 in., 7 in., 10 in.
c
Determine if the given side lengths form a triangle.
4, 5, 10
4, 5, 9
4, 5, 7
no, no , yes
The perimeter of a rectangle is 108 in. The length is 30 in. What is the width of the rectangle?
24 in