Question

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Answer 1

41

Explanation:

You have to use Pitagoras.

a^2 + b^2 = c^2

12^2 + 12^2 = c^2

144 + 144 = c^2

288 = c^2

c = √288 = 16.9

P triangle = 16.9 + 12 + 12 = 40.9

Rounded is 41

Answer 2

72

so the second one

Explanation:

Triangles area= Base x Height ÷ 2

12x12= 144

144÷ 2 = 72