Question

please complete the questions step by step​

Answer 1

SOLUTION

• Q.7
• Area of quadrilateral = Area of triangle ACD + Area of triangle ABC
• Area = 1/2(AC×DE) +1/2(AC×BF)
• Area = 1/2(16×12) + 1/2(16×8)
• Area = 1/2×16(12+8)
• Area = 160 cm²

• Q. 8
• Area of shaded region = Area of rectsngle - 2× Area of square
• Area = 18×12 - 2×3×3
• Area = 216 + 18
• Area = 198 cm²

• Q. 9
• Length of 2nd diagonal = 2×Area of rhombus/ first diagonal
• Length of 2nd diagonal = 120 ×2/ 5 = 48 cm

• Q.10
• Area of shaded region = Area of square- Area of semi circle
• Area = 20×20 - (pi×7²)/2
• Area = 400 - 22×7×7/7×2
• Area = 400 - 77
• Area = 323 cm²

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