Geometry
# Calculating Areas

If each square has a side length of 1, what is the area of the blue trapezium?

Which of the following triangles has a larger area:

- triangle A with side lengths \( 13, 13, 10 \), or
- triangle B with side lengths \( 13, 13, 24\, ?\)

Given that all the circles have equal radius of 10 cm, what is the area of the shaded blue part?

In this grid, each rectangle is labelled with its area. What area should replace the question mark?

In the above figure, which shaded area is larger?

The small circles all have the same size.

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