ppt

2. Power Point Presentation By,
LIZA D.L
Mathematics Option
Reg. No: 18014386004
Year: 2014-2015
St. Thomas Training college Mukkolakkal

4. A Triangle is a closed figure with three
vertices, three sides and three angles.

6. Classifying Triangles by their sides
1. Equilateral Triangles
2. Isosceles Triangle
3. Scalene Triangle
1.

7.  The measures of each angle 60°.
 All sides are equal.

8. Height(AD) =
√3𝑎
2
Base (BC) = 𝑎
Area =
1
2
x b x h
=
1
2
x 𝑎 x
√3𝑎
2
=
√3𝑎2
4

9.  Two equal side
 Two equal angles

10.  All sides are different.
 All angles are different.

11. 1. Acute Angled Triangle
2. Right Angled Triangle
3. Obtuse Angled Triangle

12. A triangle that has all angles less than 90°

13.  Acute Isosceles Triangle
 Acute Scalene Triangle

14.  Side opposite to the right angle is
the hypotenuse (longest side of
the right angled triangles).
 The other two sides are called
legs.
 A right angle may be isosceles or
scalene.

15.  Isosceles Right angled triangle
 scalene Right angled triangle

16. A triangle with one angle greater than 90°.

17. 1. Obtuse Isosceles triangle
2. Obtuse Scalene triangle

18. The sum of the angles in a triangle is 180°.
A +  B +  C = 180°

19. Area =
1
2
(b x h)
Where,
b - Base
h- Height