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Answer:
B. 24 cm²
Explanation:
The formula for the area of a triangle is ...
A = 1/2bh
Here, you have a base of 4 cm and a height of 3 cm, so the area is ...
A = (1/2)(4 cm)(3 cm) = 6 cm²
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The rectangle on the right is 3+1.5 = 4.5 cm high, and 8 -4 = 4 cm wide. Its area is ...
A = WH
A = (4 cm)(4.5 cm) = 18 cm²
The total area is the sum of the areas of the parts:
total area = triangle area + rectangle area
total area = 6 cm² + 18 cm² = 24 cm²