Name _____________________
Block ________
Date ________________
9.1 Area of Quadrilaterals and Triangles
Determine the area of each shape. Justify your answer.
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2. P=_______ A=______
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14.
11. P=______ A=________
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13. P=________ A=________
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Find the perimeter and the area
23.
10
24.
25 cm
6
24 cm
Use the area formulas for triangles and trapezoids to find each missing measurement.
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31. The area of a triangle is 216 square units. If the height of 18 units, what is the length of the base?
32. The diagonals of a rhombus are 21 and 16 centimeters long, Find the area of the rhombus.
33. The height of a trapezoid is 9 cm. The bases are 8 cm and 12cm long. Find the area.
34. The area of a trapezoid is 80 square feet. If the height of 8 units, find the median.
(* reminder: median= ½( b1 + b2))
35. A trapezoid has an area of 908.5 cm2. If the altitude measures 23 cm and one base measures 36 cm, find the
length of the other base.
36. A trapezoid has an area of 50 square inches and its bases are 8 and 17 inches long. Find the height of the
trapezoid.
37. A garden has a shape of an isosceles right triangle. The length of the hypotenuse is 16feet. What is the area
of the garden?
38. Sarah wants to build a fence around her square garden. If the area of garden is 64 square feet, how many
feet of fence will she need?