Question

find the base of a triangle whose area is 90 centimetre square and the height 12 centimetre​

Answer 1

Step-by-step explanation:

Area of a triangle: ½ x base x height

Therefore,

90 cm²= ½ x Base x 12cm

Let the length of base be x,

So,

90 cm²= ½ x X x 12cm

X= 2 x 90÷12

X= 15

Therefore, The base of the given triangle is 15cm