Question

Find the area of a triangle two side of the triangle are 18 cm, and 12 cm. and the perimeter is 40 cm.​

Answer 1

Answer:

60 $cm^2$

Step-by-step explanation:

Perimeter = 40 cm

Sum of two sides = 18 cm + 12 cm = 30 cm

Therefore, third side = 40 cm - 30 cm = 10 cm

Longest side = 18 cm

Hence, area of triangle = 1/2 x 12 x 10 $cm^2$ = 60 $cm^2$

Answer 2

Answer: 60 cm^{2}

Step-by-step explanation:

40 =18+12+x

40=30+x

40-30=10

10=x

The three sides of the triangle are 18,12, and 10

Area of a triangle =1/2xbxh

=1/2x10x12

=60