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Grade 8 Triangle Properties Worksheet

This worksheet covers fundamental properties of triangles, including angle sums, types of triangles, and the Pythagorean theorem, suitable for Grade 8 math students.

Grade 8 Math GeometryTriangle Properties
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Includes

Multiple ChoiceFill in the BlanksTrue / FalseShort AnswerLong Answer

Standards

CCSS.MATH.CONTENT.8.G.A.5CCSS.MATH.CONTENT.8.G.B.7

Topics

mathgeometrytrianglesgrade 8
7 sections · Free to use · Printable
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Grade 8 Triangle Properties

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Read each question carefully and answer to the best of your ability. Show all your work where necessary.

1. What is the sum of the interior angles of any triangle?

a

90 degrees

b

180 degrees

c

270 degrees

d

360 degrees

2. A triangle with all three sides of different lengths is called a:

a

Equilateral triangle

b

Isosceles triangle

c

Scalene triangle

d

Right triangle

3. The longest side of a right-angled triangle is called the  .

4. An   triangle has two sides of equal length.

5. A triangle can have two obtuse angles.

T

True

F

False

6. The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

T

True

F

False

7. In a triangle, two angles measure 45° and 65°. What is the measure of the third angle?

8. A right-angled triangle has legs of length 6 cm and 8 cm. Calculate the length of its hypotenuse. (Draw a diagram to help you.)

6 cm8 cm

9. A ladder 10 meters long is leaning against a wall. The base of the ladder is 6 meters away from the wall. How high up the wall does the ladder reach? Draw a diagram and show your work.