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# Heron's Formula Practice Questions

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Updated on Oct 2, 2011

Read the following study guide for a concept review:

Heron's Formula Study Guide

## Practice Questions

Find the area of each triangle

Find the area of the triangle with edges of the three given lengths.

 7 6, 10, 12 8 9, 9, 10 9 4, 4, 4 10 10, 14, 20 11 6, 8, 9 12 12, 15, 17 13 30, 40, 55 14 10, 16, 19 15 33, 44, 55 16 4, 12, 15 17 2, 14, 15 18 9.6, 12.2, 15.6 19 31.8, 39.4, 40.2 20 17.8, 18.2, 18.6

Find the area of the figure.

 1 area = √24 ≈ 4.899 sq.in. 2 area = √360 ≈ 18.974 sq.ft. 3 area = √720 ≈ 26.833 sq.mi. 4 area ≈ 2.905 sq.in. 5 area ≈ 8.182 sq.ft. 6 area ≈ 18.62 sq.mi. 7 area = √896 ≈ 29.933 8 area = √1400 ≈ 37.417 9 area = √48 ≈ 6.928 10 area = √4,224 ≈ 64.992 11 area ≈ 23.525 12 area = √7,700 ≈ 87.750 13 area ≈ 585.469 14 area ≈ 79.990 15 area = 726 16 area ≈ 17.662 17 area ≈ 12.527 18 area ≈ 58.557 19 area ≈ 579.944 20 area ≈ 143.29 21 area ≈ 30 sq. in.

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