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Chapter 12: Triangles Exercise 12.2 Question: 1 Total number of parts of a triangle is Solution: Six: Three sides and three angles Question: 2 A perpendicular drawn from a vertex to the opposite side of a triangle is known as Solution: An Altitude: An Altitude is defined as the perpendicular drawn from a vertex to the opposite side of a triangle. Question: 3 A triangle Solution: has three altitudes Question: 4 Line segment joining the vertices to the mid – points of the opposite side of a triangle is known as Solution: Medians: A median is defined as the line segment joining the vertex to the mid – point of the opposite side of a triangle. Question: 5 A triangle whose no two sides are equal is called Solution: A scalene triangle: A Scalene triangle is defined as the triangle in which no sides are equal. Question: 6 A triangle whose two sides are equal is known as Solution: An isosceles triangle: An isosceles triangle is a triangle that has two equal sides. Question: 7 A triangle whose two sides are equal is called Solution: An equilateral triangle is defined as a triangle whose all sides are equal. Question: 8 The sum of the lengths of side of a triangle is known as its Solution: Perimeter: Perimeter is defined as the sum of the length of all the sides of a triangle Question: 9 A triangle having all sides of different length is known as its Solution: Scalene triangle: A Scalene triangle is defined as a triangle having all sides of different length. Question: 10 A triangle whose one angle is more than 90° is called Solution: An obtuse triangle: An obtuse triangle is a triangle whose one angle is more than 90o
Total number of parts of a triangle is
Six: Three sides and three angles
A perpendicular drawn from a vertex to the opposite side of a triangle is known as
An Altitude: An Altitude is defined as the perpendicular drawn from a vertex to the opposite side of a triangle.
A triangle
has three altitudes
Line segment joining the vertices to the mid – points of the opposite side of a triangle is known as
Medians: A median is defined as the line segment joining the vertex to the mid – point of the opposite side of a triangle.
A triangle whose no two sides are equal is called
A scalene triangle: A Scalene triangle is defined as the triangle in which no sides are equal.
A triangle whose two sides are equal is known as
An isosceles triangle: An isosceles triangle is a triangle that has two equal sides.
A triangle whose two sides are equal is called
An equilateral triangle is defined as a triangle whose all sides are equal.
The sum of the lengths of side of a triangle is known as its
Perimeter: Perimeter is defined as the sum of the length of all the sides of a triangle
A triangle having all sides of different length is known as its
Scalene triangle: A Scalene triangle is defined as a triangle having all sides of different length.
A triangle whose one angle is more than 90° is called
An obtuse triangle: An obtuse triangle is a triangle whose one angle is more than 90o
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Chapter 12: Triangles Exercise 12.1 Question: 1...
