Question

find out the perimeter of a triangle whose sides are
a) 15cm,18cm and 20cm
b) 2 1 cm 25cm and 28cm c)7cm 8cm and 11cm
d) 12 CM 15m and 18cm


ans in process first ​

Answer 1

Answer:

1. 53

2. 74

3. 30.15

make my answer best

Answer 2

Answer:

area of perimeter=√s(s-a)(s-b)(s-c)

hope you you know heron's formula

all the best

Step-by-step explanation:

Use heron's formula