High School

In parallelogram ABCD, O is the intersection point of its diagonals. P is a point on DO. If the area of triangle APB is 24.5 cm², find the area of triangle BPC.

Answer :

Triangles APB and BPC share the same base and height, resulting in their areas being equal. Therefore, the area of triangle BPC is also 24.5 cm².

In parallelogram ABCD, O is the intersection point of its diagonals, making O the midpoint of both diagonals. P is a point on DO. We are given that the area of triangle APB is 24.5 cm² and need to find the area of triangle BPC.

Since diagonals of a parallelogram bisect each other, O is the midpoint, meaning triangles AOB, BOC, COD, and DOA each have equal areas as they are formed by the halving of diagonals.

Step-by-Step Solution:

  1. Triangles AOB and COD are equal in area because diagonals split the parallelogram into two equal areas.
  2. Area of triangle AOB (or BOC, COD, DOA) is half of the total area of the parallelogram; thus, they are equal in area.
  3. Since triangles APB and BPC share the same base PB and height from point O (intersection), they form equal areas within the parallelogram's divided sections.

Given area of triangle APB is 24.5 cm², the area of triangle BPC must also be 24.5 cm².