Angle Sum Of A Triangle, Angle On A Straight Line, Angle At A point       

CONTENT

(1)          Angle sum of a triangle

(2)          Angles on a straight line

(3)          Angles at a point

Angle sum of a triangle

(a)          Definition:          A Triangle is a three-sided plane figure with three angles.

(b)          Types of triangles

(i)            Scalene triangle

(ii)           An Isosceles Triangle:    This type of triangle has two adjacent  sides equal and two angles equal

(iii)          An Equilateral Triangle

 This type of triangle has all its sides equal and all its angles equal each     angle is 60⁰.

(iv)         An Acute angled triangle                 This type of triangle has each of its angle less than 90⁰ i.e. each angles is                 acute.

(v)                       An Obtuse angled triangle

                            This type of triangle has one of its angles more than 90⁰.

(vi) A right – angled triangle

                            This triangle has one of its angles equal to 90⁰. The side opposite the           right angle is the longest side and is often called hypotenuse.