Area of Quadrilaterals
Area of Triangles
Solving Area Equations
100
What is a quadrilateral?
a four-sided figure.
100
What is the formula to find the area of a triangle?
A=1/2bh
100
A ship's triangular signal flag has a base of 8 inches and an area of 64 square inches.
A=1/2bh
h=16 in.
200
Find the area of the parallelogram, and what is the formula you use to find the area?
50cm2
A=bh
200
Find the area of the triangle.
A=1/2(8)(18)
A=4(18)
A=72 m2
200
A section in a stained glass window is shaped like a right triangle. The section has a height of 7.5 cm. If the area of the section of glass is 17.25 cm2, how long is the base of the section?
A=1/2bh
b=4.6 cm
300
What is the area of a parallelogram that has a base of
4 1/2
in. and a height of
2 1/4
in.
10.8 in or
10 4/5 in.
300
Find the area of the triangle.
A=1/2(10)(24)
A=(5)(24)
A=120 in.2
300
A park in shaped like a trapezoid. It has an area of 7.2 square miles. One base is 1.2 miles, and the other base is 2.4 miles long. What is the height of the trapezoid.
A=1/2h(b_1+b_2)
h=4 mi.
400
An attic wall is on the shape of a trapezoid. What is the area of the wall? What is the formula to find the area of a trapezoid?
A= 1/2(10)(12+25)
A=5(37)
A=185 ft2
A=1/2h(b_1+b_2)
400
The Philadelphia Museum of Art's triangular pediment has the measurements shown in the diagram. What is its area?
A=1/2(12)(70)
A=6(70)
A=420 ft.2
400
Mel and Kenneth want to refinish the community center gym floor. The rectangular floor is 15.2 m wide and 25.6 m long. If each gallon of polyurethane covers about 180 square meters, how many gallons should Mel and Kenneth buy?
Gallons=3
500
Renaldo designs a tabletop in the shape of a rhombus. The tabletop diagonals measure 5 feet and 8 feet. How much wood will Renaldo need for the tabletop? What is the formula to find the area of a rhombus?
A=20ft2
A=1/2d_1*d_2
500
Julia wants to pain a triangular wall in her attic. The wall has a height of 2 m and a base of 4 m. What is the area of the wall?
A=1/2(2)(4)
A=1(4)
A=4m2
500
A section in a stained glass window is shaped like a trapezoid. The top base is 4 centimeters and the bottom base is 2.5 centimeters long. If the area of the section of glass is 3.9 square centimeters, how tall is the section.
h=1.2 cm