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A) 8 sq. cm. |

B) 4 sq. cm. |

C) 2 sq. cm. |

D) 6 sq. cm. |

Correct Answer:

D) 6 sq. cm. |

Description for Correct answer:

From the Triangle ABC find AB.

\( \Large AC^{2}=AB^{2}+BC^{2} \)

\( \Large 5^{2}=AB^{2}+BC^{2} \)

\( \Large AB^{2}=5^{2}-BC^{2}=5^{2}-3^{2}=25-9=16 \)

\( \Large AB=\sqrt{16} \) = 4 cm.

Area of the triangle = \( \Large \frac{1}{2}bh \)

=\( \Large \frac{1}{2} \times 3 \times 4 \)= 6 sq. cm.

From the Triangle ABC find AB.

\( \Large AC^{2}=AB^{2}+BC^{2} \)

\( \Large 5^{2}=AB^{2}+BC^{2} \)

\( \Large AB^{2}=5^{2}-BC^{2}=5^{2}-3^{2}=25-9=16 \)

\( \Large AB=\sqrt{16} \) = 4 cm.

Area of the triangle = \( \Large \frac{1}{2}bh \)

=\( \Large \frac{1}{2} \times 3 \times 4 \)= 6 sq. cm.

Part of solved Area and perimeter questions and answers : >> Elementary Mathematics >> Area and perimeter

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