Question

Find the area of a triangle whose sides are 12 cm, 6 cm and 15 cm

Answer 1

Answer:

36 cm²

Step-by-step explanation

the sides are a Pythagoras triplet

hence angle made by sides 12 cm and 6 cm is 90 degrees

therefore

A=1/2 x 12 x 6

A=36 cm²

Answer 2

Answer:

34.19 cm²

Step-by-step explanation:

semi perimeter = 16.5

area =

$\sqrt{16.5(16.5 - 15)(16.5 -12)(16.5 - 6) } \\ = \sqrt{16.5 \times 1.5 \times 4.5 \times 10.5} \\ \sqrt{1169.43} \\ = 34.19$

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