Rhombus diagonals and an isosceles triangle

Rhombus diagonals and an isosceles triangle

Secondary 2
TGM Original Questions
  1. A rhombus has side \(13\) cm and shorter diagonal \(10\) cm.
    1. Find the longer diagonal.
    2. Hence find its area.
  2. An isosceles triangle has base \(30\) cm and area \(240\text{ cm}^2\). Find its perimeter.

Solution:

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Answer:(a)(i) \(24\) cm; (ii) \(120\text{ cm}^2\); (b) \(30+2\sqrt{481}\approx73.9\) cm.

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