Classifying Triangles and Quadrilaterals
Name: _______________________________
Date: _______________________________
Part A: Classifying Triangles
Remember: Triangles can be classified by their sides (equilateral, isosceles, scalene) or by their angles (acute, right, obtuse).
1.
A triangle with all three sides equal is called an _________________ triangle.
2.
A triangle with exactly two sides equal is called an _________________ triangle.
3.
A triangle with all three sides of different lengths is called a _________________ triangle.
4.
A triangle with one 90° angle is called a _________________ triangle.
5.
A triangle with one angle greater than 90° is called an _________________ triangle.
Part B: Identifying Quadrilaterals
Match each description to the correct quadrilateral by writing the letter in the box.
A. Square
B. Rectangle
C. Parallelogram
D. Trapezium
6.
Has four equal sides and four right angles. ____
7.
Has two pairs of parallel sides and four right angles, but not all sides are equal. ____
8.
Has exactly one pair of parallel sides. ____
9.
Has two pairs of parallel sides but no right angles. ____
Part C: True or False
Write T for true or F for false.
10.
All squares are rectangles. ____
11.
All rectangles are squares. ____
12.
An equilateral triangle has three equal angles. ____
13.
A parallelogram has two pairs of equal sides. ____
14.
A right-angled triangle can also be isosceles. ____