Rectangles & Parallelograms
What is the formula to find the area of a rectangle or parallelogram?
A = bh
What is the formula to find the area of a trapezoid?
A = 1/2 (b1 + b2)h
What is the formula to find the area of a triangle?
A = 1/2 bh
A = (bh)/2
A = (pi)r2
A Greek letter representing the constant 3.14159...
Pi
The floor of a domed camping tent measures 7 feet by 9 feet. What is the area of the floor of the tent?
63 ft2
b1= 1.1 cm
b2= 3.4 cm
h = 2 cm
4.5 cm2
Do the lengths 10.0, 4.6, and 5.3 form a triangle?
No, 4.6 and 5.3 make a length of 9.9 which is not longer than the third side.
What is the area of a circle with a radius of 4 cm?
50.24 cm2
describing two or more shapes, angles, or other properties with identical measures
Congruent
Miss Steiert's room is being re-tiled. She has to decide between 6-inch square tiles and 12-inch square tiles. What is the difference in area of the two tiles they are considering?
108 in2
The side of a bookshelf has a shape like a trapezoid. The top of the shelf has a length of 2.54 inches, the bottom has a length of 4 inches, and the height of the shelf is 24 inches. What is the area?
78.48 in2
In triangle XYZ, angle X is 70.4 degrees. If angle Y and angle Z are congruent, what is the measure of angle Y in degrees?
54.8 degrees
What is the area of a a circular garden with a diameter of 24 meters?
452.16 meters2
a plane figure with two sets of parallel lines that form 4, 90 degree angles
rectangle
An Olympic sized pool measures 30 meters by 50 meters when designed for long course. The width of another pool is 20 meters by 25 meters. What is the difference in the area of the pools?
1000 square meters
A trapezoid has an area 15 square feet. If the bases are 4 feet and 6 feet, what is the height of the trapezoid?
3 feet
Find the area of a scalene triangle with a height of 17.6 feet and a base of 31.2 feet
274.56 in2
A ferris wheel rotates 3 times before the ride is over. If the diameter is 75 feet, what is the total distance the ferris wheel travels? Use 3.14 for Pi.
706.5 feet
A measure of square units within a plane figure
Area
The base of a building is shaped like a parallelogram. the first floor has an area of 20,000 square feet. If the base of this parallelogram is 250 feet, what is the height?
80 feet
A trapezoid has an area of 182 in2 . The height is 6 in, and the length of one of the bases is 15 in. Which of the following is an equation that could be used to find the length of the other base?
a. 182 = (6)(15)(b)
b. 182 = (6)(15+b)
c. 182 = (0.5)(6)(15+b)
d. 182 = (0.5)(6)(15)
c. 182 = (0.5)(6)(15+b)
The area of a triangle is 9 square cm. If the height of the triangle is 3.6 cm, what is the base of the triangle?
5 cm
The area of a 12 inch pizza crust is 113.04 inches squared. The toppings cover an area of 78.5 inches squared. What is the diameter of the toppings?
10 inches
The distance around a circle
Circumference