(1) Sum of angles of a triangle is 180° .
∠BAC+∠ACB+∠CBA=180
(2) Sum of any two sides of a triangle is greater than the third
side of that triangle. In the above
triangle AB+BC > AC , BC + AC > AB , AB + AC > BC
Area of Traingle :
Where a, b, c are the sides of a triangle
equilaterial triangle :
Triangle with all sides equal in length is termed as euilaterial triangle .
In equilaterial triangle all angles are equal to 60°
Area of equilaterial triangle :
Right Angled Triangle :
For right angled triangle one angle should be of 90°.
Here, l is hight, b is base and h is hypoteneous of right angled triangle .
Area of right angled traingle =
Isoceles Triangle:
A triangle with any two sides and opposite angles equal is termed as Isoceles triangle.
Area of Isoceles triangle :
Area of Isoceles triangle = (1/2 )*(a/2)*(h)
∠BAC+∠ACB+∠CBA=180
Area of Traingle :
Where a, b, c are the sides of a triangle
Types of Traingles :
equilaterial triangle : Triangle with all sides equal in length is termed as euilaterial triangle .
In equilaterial triangle all angles are equal to 60°
Right Angled Triangle :
For right angled triangle one angle should be of 90°.
h^2 = l^2 + b^2
Area of right angled traingle =
(1/2)*(l*b)
Isoceles Triangle:
A triangle with any two sides and opposite angles equal is termed as Isoceles triangle.
Area of Isoceles triangle :
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