Answer:
11. 36 m²
Formula:
[tex]a = \frac{(bh)}{2} = \frac{(6 \times 12)}{2} = \frac{72}{2} = 36[/tex]
12. 7
Formula:
[tex]h = \: a \div b = 84 \div 12 = 7[/tex]
13. 14 m
Formula:
[tex]h = 2 \frac{a}{(b1 + b2)} = 2 \times \frac{168}{(9 + 15)} = 2 \times \frac{168}{24} = 2 \times 7 = 14[/tex]
14. 32 cm²
[tex]a = \frac{(b1 + b2)h}{2} = \frac{(6 + 10) \times 4}{2} = \frac{16 \times 4}{2} = \frac{64}{2} = 32[/tex]
15. 12 m
[tex]b = a \div h = 36 \div 3 = 12[/tex]
Step-by-step explanation:
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