Jharne De and Ranjana Kumar Solutions for Chapter: Properties of Triangles, Exercise 1: Mental Maths

If the angles of a triangle are in the ratio $1 : 1 :1$, then each angle of the triangle is _____$°$.

If two angles of a triangle are $70°$ and $40°$ , then its third angle is _____$°$.

The sum of two sides of a triangle is always _____ than its third side. (smaller / greater / equal)

Natural numbers $a, b$ and $c$ form Pythagorean triplets if $c^2=a^2$_____ $b^2$

An exterior angle of a triangle is equal to the sum of the _____ angles of the triangle.

Any triangle can have a maximum of _____ right angle/s. (Write in words)

Any triangle can have _____obtuse angle/s. (Write in words)

The difference of any two sides of a triangle is always _____ than the third side. (Less, greater, equal)