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Triangles and quadrilaterals
Triangles and quadrilaterals
Example 1
A triangle has sides of 5cm,5cm and 8cm. Classify it by its sides.
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Answer: Isosceles
- Two sides are equal, and 5+5>8, so it is a valid isosceles triangle.
Example 2
A quadrilateral has four equal sides but does not have a right angle. What is its most specific name?
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Answer: Rhombus
- Four equal sides make a rhombus; without right angles it is not a square.
Example 3
Which statement is always true?
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Answer: Every square is a rectangle
- A rectangle has four right angles. Every square has four right angles and therefore meets this definition.
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