Question

The area of a triangle is 31.5 sq.cm.if the base is 18cm,find its altitude​

Answer 1

Answer:

h=3.5cm

Step-by-step explanation:

since area of a triangle is 1/2bh

if 1/2bh=31.5

1/2×18×h=31.5

9×h=31.5(18/2=9)

therefore h=31.5/9=3.5cm

Answer 2

Answer:

3.5cm

Step-by-step explanation:

area of triangle=1/2×base×height

31.5=1/2×18×height

31.5×2=18× height

63=18×height

height=63÷18

altitude=3.5cm