Question

the base of an isosceles triangle is 30 m and area is 300m2.find the perimeter and altitude​

Answer 1

Answer:

altitude = 20 m

perimeter =  70 m

Step-by-step explanation:

given, area = 300 m^2

        base= 30 m

area of triangle = 1/2 × base× altitude

300 = 1/2 × 30 × altitude

300 = 15 × altitude

altitude × 15 = 300

altitude = 300÷ 15

altitude = 20

now, 2 sides are equal so

altitude = 3rd side = 20  

perimeter  =  sum of all sides

perimeter =  30 + 20 + 20

perimeter = 70