Chhattisgarh Board Solutions for Chapter: Triangle and Quadrilateral, Exercise 14: EXERCISE 9.1

Julie has made the following statement. Identify whether it is true or false. If false statement, then correct them.

One arm or side of a triangle cannot be smaller than the sum of the other two arm lengths or sides.

Julie has made the following statement. Identify whether it is true or false. If false statement, then correct them.

A triangle has $3$ arms, $3$ vertices and $3$ internal angles.

Julie has made the following statement. Identify whether it is true or false.

When one angle of a triangle is obtuse, then the triangle is known as an obtuse-angled triangle.

Julie has made the following statement. Identify whether it is true or false. If false statement, then correct them.

All the $3$ angles of an acute angled triangle need not be acute.

Julie has made the following statement. Identify whether it is true or false. If false statement, then correct them.

If the measure of two angles of a triangle are given, the measure of the third angle can be determined.

Julie has made the following statement. Identify whether it is true or false. If false statement, then correct them.

All the three sides of an equilateral triangle are equal but all its three angles are not equal.

Julie has made the following statement. Identify whether it is true or false. If false statement, then correct them.

The angles in front of the two equal arms of an isosceles triangle are also equal.

Julie has made the following statement. Identify whether it is true or false. If false statement, then correct them.

An equilateral triangle is always an acute-angled triangle.