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Types of Triangles Based on Angles and Sides

Complete the test and get an award.

This is a free math test at www.math10.com for students of fourth grade. The questions ask you to classify triangles by their angles (acute, right, obtuse) and by their sides (scalene, isosceles, equilateral), either from a figure or from the measurements given in the question.
Question 1 (1 point)
The angles of this triangle are given. What type of triangle is it according to its angles?
The angles of this triangle are given. What type of triangle is it according to its angles?

Question 2 (1 point)
Look at the angles of this triangle. What type of triangle is it according to its angles?
Look at the angles of this triangle. What type of triangle is it according to its angles?

Question 3 (1 point)
The lengths of the sides of this triangle are given. Which statement about it is true?
The lengths of the sides of this triangle are given. Which statement about it is true?

Question 4 (1 point)
The lengths of the sides are given. What type of triangle is it according to its sides?
The lengths of the sides are given. What type of triangle is it according to its sides?

Question 5 (2 points)
Each angle of an equilateral triangle has the same measure. How many degrees is each one?
Answer:
Question 6 (1 point)
Only the angles of this triangle are given. What type of triangle is it according to its sides?
Only the angles of this triangle are given. What type of triangle is it according to its sides?

Question 7 (1 point)
Read the angle measures carefully. What type of triangle is it according to its angles?
Read the angle measures carefully. What type of triangle is it according to its angles?

Question 8 (1 point)
The angles of this triangle are shown. What type of triangle is it according to its sides?
The angles of this triangle are shown. What type of triangle is it according to its sides?

Question 9 (2 points)
The angles of a triangle are [tex]40^\circ[/tex], [tex]40^\circ[/tex] and [tex]100^\circ[/tex]. How many of its sides have the same length?
Answer:
Question 10 (1 point)
All three angles of this triangle are different. What type of triangle is it according to its sides?
All three angles of this triangle are different. What type of triangle is it according to its sides?

Question 11 (1 point)
The square marks a right angle and the small dashes mark sides of equal length. Which pair of names describes this triangle?
The square marks a right angle and the small dashes mark sides of equal length. Which pair of names describes this triangle?

Question 12 (1 point)
The square marks a right angle. Which pair of names describes this triangle?
The square marks a right angle. Which pair of names describes this triangle?

Question 13 (2 points)
Four triangles have these angles: A — [tex]30^\circ, 60^\circ, 90^\circ[/tex]; B — [tex]20^\circ, 70^\circ, 90^\circ[/tex]; C — [tex]45^\circ, 45^\circ, 90^\circ[/tex]; D — [tex]50^\circ, 60^\circ, 70^\circ[/tex]. How many of them are right triangles?
Answer:
Question 14 (1 point)
Which statement is true?

Question 15 (2 points)
Every angle of a triangle measures [tex]60^\circ[/tex]. One of its sides is [tex]7[/tex] inches long. How long is each of the other two sides, in inches?
Answer:

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