Question

In triangle ABC LA-Lc and BC = 4 then,
the perimeter of triangle ABC is​

Answer 1

Answer:

Angle A = angle C

therefore this angle is right angled triangle

angleA=angle C=45

angle B=90

by 45-45-90 therem

AB=1/underoot2×AC---(side opposite 45 angle)

AB=1/underoot 2×5

AB=5/underoot 2

AB=7.07

perimeter=AB+BC+AC

Perimeter=7.07+4+5

perimeter= 16.07