Respuesta :

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Note: I did NOT use two different methods.

First Triangle: 52.5 square feet

7 x 12 = 84

84 ÷ 2 = 42

7 x 3 = 21

21 ÷ 2 = 10.5

42 + 10.5 = 52.5

Second Triangle: 369 square feet

18 x 32 = 576

576 ÷ 2 = 288

18 x 9 = 162

162 ÷ 2 = 81

288 + 81 = 369

Please let me know if I am wrong.

KidLink1

Answer:

the formula is base times hight divided by two so use the formula to sovle the problem

Step-by-step explanation: