Answer:
Explanation:
A. 1). Area of the rectangle = length×width = 11×8 = 88 cm²
Perimeter = 2(18+11) = 58 cm
2).Area of a parallelogram = length×height = 24×16 = 384 ft²
Perimeter = 2(19+24) = 2×43 = 86 ft
3). Area of a right angle triangle = (1/2)×base×height = (1/2)×12×9 = 54 in²
Perimeter = (9+12+15) = 36 in
4). Area of a triangle = (1/2)×Base×height = (1/2)×21×19 = 199.5 m²
Perimeter = (20+21+23) = 64 m
5). Area of an obtuse angle triangle = (1/2)×height×base = (1/2)×2.9×2.4 = 2.9×1.2 = 3.48 cm²
Perimeter = (2.9+2.4+4.5) = 9.8 cm
6). Area of a parallelogram = base × height = 56×90= 5040 ft²
Perimeter = 2(56+100) = 2×156 = 312 ft
B. 7). Area of the shaded area = (27×27 - 12×12) = 729-144 = 585 in²
8). Area of the shaded area = 10(9+7) - (1/2)×10×9 = 160 - 45 = 115 cm²
9). Area of the shaded area = 50×53 - 25×23 = 2650 - 575 =2075 ft²
10). Area of the shaded area = 10×13 - (1/2)×6×8 = 130 - 24 = 106 m²
11). Area of the shaded area = 18×18 - (1/2)×18×9 = 324 - 81 =243 in²
12). Area of the shaded area = 11×17 - (1/2)×11×17 = (1/2)×11×17 = 93.5 cm²