Question

the following question ​

Answer 1

Answer:

15 =X let take X

15x = 180

X= 180÷15

then os are equal

Answer 2

Step-by-step explanation:

semi perimeter = total perimeter /2

15 = total perimeter /2

15 x 2 = total perimeter

30 = total perimeter

perimeter of triangle = a + a + a

30 = 3a

30/3 = a

10cm = a