Question

observe the following triangle with lenghts 5cm,4cm,3
cm and answer the following questions
1) why sin c = cos a

Answer 1

Answer:

The given lengths of the sides are 3 cm,4 cm and 5 cm

3

2

=3×3=9;

4

2

=4×4=16;

5

2

=5×5=25

We found that

9+16=25

3

2

+4

2

=5

2

Therefore, the triangle is a right-angled triangle.

Note : In any right-angled, triangle the hypotenuse happens to be the longest side.

In this example the side with length 5 cm is the hypotenuse.