In an isosceles triangle `A B C ,\ A B=A C=25 c m ,\ \ B C=14 c m` . Calculate the altitude from `A` on `B C` .

In an isosceles triangle A B C , if A B=A C=25 c m and B C=14 c m , then the measure of altitude from A on B C is (a) 20cm (b) 22cm (c) 18cm (d) 24cm

In an isosceles triangle A B C , if A B=A C=13 cm and the altitude from A on B C is 5 cm, find B C .

In a rectangle A B C D ,\ \ A B=20 c m , /_B A C=60^@ . Calculate side B C .

Fill in the blanks in the following so that each of the following statements is true. (i) Sides opposite to equal angles of a triangle are ....... (ii) Angle opposite to equal sides of a triangle are ....... (iii) In an equilateral triangle all angles are ....... (iv) In a A B C if /_A=/_C , then A B=\ ..... (v) If altitudes C E\ a n d\ B F of a triangle A B C are equal, then A B= ........ (vi) In an isosceles triangle A B C with A B=A C , if B D\ a n d\ C E are its altitudes, then B D is .......... C E . (vii) In right triangles A B C\ a n d\ D E F , if hypotenuse A B=E F and side A C=D E , then A B C\ ~= ....

In a rectangle A B C D ,\ \ A B=20 c m ,\ \ /_B A C=60o , calculate side B C and diagonals A C and B D .

In triangle A B C is right-angled at B . Given that A B=9cm ,\ A C=15 cm calculate B C .

Construct a triangle A B C in which B C=5. 7\ c m ,\ /_B=45^0,\ A B-A C=3c m

In an isosceles triangle A B C with A B=A C , B D is perpendicular from B to the side A C . Prove that B D^2-C D^2=2\ C D A D

If an isosceles triangle A B C in which A B=A C=6c m is inscribed in a circle of radius 9c m , find the area of the triangle.

If an isosceles triangle A B C in which A B=A C=6c m is inscribed in a circle of radius 9c m , find the area of the triangle.