Answer:
The length of each of the two equal sides of the triangle is 25.1cm
Explanation:
Cut isoceles triangle into 2 right-angle triangle.
42.67in ÷ 2 = 21.335in
Using trigonometric formula:
Let angle = ?°
cos ?° = adjacent/hypotanuse
cos 31.84° = 21.335/hypo
hypo = 21.335/cos 31.84°
= 25.1inches (3s.f)
