Question

Find
the area of
of triangle, two sides which are 18cm and 10 cm and the perimeter is 42cm​

Answer 1

Answer:

90 cm

Step-by-step explanation:

First, find the length of the third side.

We know,

The perimeter is 42 cm, one side = 18 cm, second side = 10 cm.

∴ 18 + 10 = 28

  42 - 28 = 14 cm

The third side is 14 cm.

Now find it's area.

The formula for finding the area of a triangle is = Half x Base x Height

Therefore, 1/2 x 10 x 18

= 90cm

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