Verified answer

Finding the area.

A= B×H÷2= Area of the Big Triangle

• (4×10)÷2=N
• 40÷2=N
• =20cm

A= B×H÷2= Area of the Small Triangle

• (3×5)÷2=N
• 15÷2=N
• =7.5cm

Now that you found the answer of both circles. Subtract them.

• 20-7.5=12.5

Therefore the answer is 12.5cm

*Note: The height of the small triangle is 5 not 10 because the height is half of the 10.

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