Sides of a triangle are 4, 5, 6 cms. Show that the greatest angle is twice the smallest angle.

The measures of the angles of a triangle are in A.P. If the greatest angle is double the least angle, express the angles of the triangle in degree and radian.

The sides of a triangle measure 13 cm,12 cm,and 5 cm.prove that the triangle is right angled.

The sides of a triangle are a, b, sqrt(a^2+b^2+ab). Find the greatest angle.

The areas of two similar triangles are 169cm^2 and 121cm^2 respectively.If the longest side of the larger triangle is 26 cm.what is the length of longest side of the smaller triangle.

The sides of a triangle are 7,4 sqrt3 and sqrt13 cms . Find the smallest angle

Express the following statements by equations : The sum of the degree measures of the three angles of a triangle is 180^@ . The measure of the 2nd angle is twice that of the 1st and exceeds the thrid angle by 40^@ .

If cosines of two angles of a triangle are proportional to the opposite sides, show that the triangle is isosceles

The length of the sides of a triangle are a+b , ab-1 and sqrt((a^2+1)(b^2+1)) . Show that it is a right angled triangle.

The medians of a triangle are 6 cm, 7.5 cm and 9 cm. Construct the triangle.

The angles of a triangle are in A.P. and the ratio of number of degree in the least angle to the number of radian in the greatest angle is 60 :pi . Find the angles in degree.