Triangle area worksheet for calculating the area of six different triangles using given base and height measurements.

Let’s solve each triangle one by one using the formula:

Area = ½ × base × height

We’ll multiply the base and height, then divide by 2.

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1) Base = 8 cm, Height = 4 cm

→ 8 × 4 = 32
→ 32 ÷ 2 = 16

Area = 16 cm²

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2) Base = 10 mm, Height = 7 mm

→ 10 × 7 = 70
→ 70 ÷ 2 = 35

Area = 35 mm²

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3) Base = 12 mm, Height = 4 mm

→ 12 × 4 = 48
→ 48 ÷ 2 = 24

Area = 24 mm²

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4) Base = 16 m, Height = 3 m

→ 16 × 3 = 48
→ 48 ÷ 2 = 24

Area = 24 m²

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5) Base = 9 cm, Height = 4 cm
*(Note: The height is drawn outside the triangle but still perpendicular to the base — that’s okay!)*

→ 9 × 4 = 36
→ 36 ÷ 2 = 18

Area = 18 cm²

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6) Base = 5 cm, Height = 3 cm
*(Again, height is shown outside — as long as it’s perpendicular to the base, we use it.)*

→ 5 × 3 = 15
→ 15 ÷ 2 = 7.5

Area = 7.5 cm²

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Final Answer:
1) 16
2) 35
3) 24
4) 24
5) 18
6) 7.5