Fill in the blanks to make the statements true. A triangle is said to be ________, if each one of its sides has the same length.

(a) 15.9 cm. (b) 25 sq cm.

[(–8) + -3 ] + 8 = 8 + [(–3) +8 ] = –3

(a) If the breadth of rectangle is x cm, the length of the rectangle is 2x (b) Perimeter in terms of x is 6x or 2(2x + x) (c) The equation formed is...

Correct answer is  (c) Right-angled triangle 

The Obtuse triangle always has altitude outside itself.

 The sum of an exterior angle of a triangle and its adjacent angle is always a right angle.

The longest side of a right angled triangle is called its hypotenuse .

Measures of each of the angles of an equilateral triangle is 60°

In an isosceles triangle, angles opposite to equal sides are Equal.

Every triangle has at least Two acute angle (s).