Question

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

Answer 1

Answer:

Let the remaining side x

Perimeter of triangle = sum of all sides

= 42

" " " = 18 +10+x=42

28 +x = 42

=x = 42 - 28 = 14

x = 14 cm

Area of triangle = 1/2 ×base ×height

= 1/2 × 14 × 10 = 70cm^2 answer