Question

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Answer 1

Answer:

Step-by-step explanation:

Let the equal sides be x

∴ Base (b) =$\frac{3}{2} x$

Perimeter = sum of all sides

42 = $\frac{3}{2} x + x+x$

84=3x+2x+2x

7x=84

x=12

Base = $\frac{3}{2} x$ = 18 cm

Equal sides = 12 cm

Answer 2

Answer: given : isosceles triangle

Perimeter=42

Step-by-step explanation:

x+x+3x/2=42

2x+3x/2=42

4x+3x/2=42

7x=84

x=84/7

x=12

Sides =12:;12:;18