No isosceles triangle is obtuse.

Important Questions on Properties of Triangles

EASY

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 1

Two angles of a triangle are of measures $105°$ and $30°$. Find the measure of the third angle(in degrees).

EASY

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 2

One of the angles of a triangle is $130°$, and the other two angles are equal. What is the measure of each of these equal angles$?$

EASY

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 3

The three angles of a triangle are equal to one another. What is the measure of each of the angles? [Write the value only]

MEDIUM

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 4

If the angles of a triangle are in the ratio $1: 2: 3$, determine three angles.

MEDIUM

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 5

The angles of a triangle are$( x-40)°$, $( x-20)°$ and ${\left(\frac{x}{2}-10\right)}^{°}$. Find the value of $x$. (Write the answer without degree symbol)

EASY

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 6

The angles of a triangle are arranged in ascending order of magnitude. If the difference between two consecutive angles is $10°$. Find the three angles.

MEDIUM

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 7

Two angles of a triangle are equal and the third angle is greater than each of those angles by $30°$. Determine all the angles of the triangle.

MEDIUM

7th CBSE

IMPORTANT

Mathematics for Class 7>Chapter 15 - Properties of Triangles>EXERCISE>Q 8

If one angle of a triangle is equal to the sum of the other two, show that the triangle is a right triangle.