How to find the area of a right-angled triangle whose legs are 4 cm and 5 cm.

To find the area of a triangle, you need to know the following formula:
S = 1/2 H * b; where b is the side of the triangle, H is the height.

We know that the first side is 4 cm, and the second is 5 cm. Knowing the sides, we can find the area of the triangle by substituting the values into the formula:

S = 1/2 * 4 * 5 = 10 cm² – the area of this triangle.

Answer: The area of the triangle is 10 cm².