RS Aggarwal Solutions Class 7 Chapter-15 Properties of Triangles (Ex 15A) Exercise 15.1 - Free PDF
FAQs on RS Aggarwal Solutions Class 7 Chapter-15 Properties of Triangles (Ex 15A) Exercise 15.1
1. Define the median and altitude of a triangle.
The median and altitude of a triangle are defined below:
Median: The median of a triangle is a line segment that joins the vertex to the midpoint of the opposite side. There are three vertices in a triangle, therefore, there are three medians in a triangle.
Altitude: The altitude of a triangle is a line segment that is made from a vertex perpendicular to the opposite side. As a triangle has three vertices, therefore, there are three altitudes of a triangle.
2. Explain the types of triangles based on sides.
On the basis of sides, there are three types of triangles which are explained below:
Equilateral triangle: Equilateral triangle is a triangle in which all sides are equal. All angles in an equilateral triangle are equal and measure 60 degrees each.
Isosceles triangle: Isosceles triangle is a triangle in which two sides and two angles are equal.
Scalene triangle: A scalene triangle is a triangle in which all sides are of different measure and no sides are equal. All angles are also of different measurements.
3. Explain the exterior angle property of a triangle.
The exterior angle of a triangle is an angle which is formed when a side of a triangle is produced. There are two ways in which an exterior angle can be formed at each vertex. According to the exterior angle property of a triangle the measure of an exterior angle of a triangle is equal to the sum of measures of two interior opposite angles of the triangle.