Perimeter, Area, and Surface Area — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A parallelogram has base 12 cm and height 7 cm; its area is 84 square centimeters.
12 times 7 equals 84 square centimeters of parallelogram area.
2. A garden plot shaped like a parallelogram has base 9 m and height 5 m; area is 45 square meters.
9 times 5 equals 45 square meters in the garden plot.
3. A trapezoid splits into a rectangle (4 by 6) and a triangle (base 3, height 4); total area is 30 square units.
Rectangle area 24 plus triangle area 6 equals 30 square units total.
4. A classroom floor is a parallelogram with base 20 ft and height 15 ft; area is 300 square feet.
20 times 15 equals 300 square feet covering the classroom floor.
5. A soccer field section is a parallelogram with base 50 m and height 30 m; area is 1500 square meters.
50 times 30 gives 1500 square meters of grass surface.
6. A trapezoid with parallel sides 8 and 12 and height 5 has area 50 square units.
Half of 20 is 10, and 10 times 5 equals 50 square units.
7. A parallelogram tile has base 6 in and height 4 in; area is 24 square inches.
6 times 4 equals 24 square inches per parallelogram tile.
8. Decomposing a trapezoid into two triangles with areas 9 and 16 gives total area 25 square units.
9 plus 16 equals 25 square units across the whole trapezoid.
9. A parallelogram-shaped flag has base 24 cm and height 10 cm; area is 240 square centimeters.
24 times 10 equals 240 square centimeters of flag fabric.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Parallelogram base 5, height 8
→ Area 40 square units
Area 40 square units
Trapezoid bases 6 and 10, height 4
→ Area 32 square units
Area 32 square units
Square side 9
→ Area 81 square units
Area 81 square units
Rectangle 7 by 12
→ Area 84 square units
Area 84 square units
5 times 8 is 40; half of 16 times 4 is 32; 9 squared is 81; 7 times 12 is 84.