In ΔABC, AB = AC and ∠B = 40 °, find the value of ∠A.

In a circle, PQ is diameter, RS is chord of length equal to radius of circle. PR and QS when produced intersect at point T. Find the ∠PTQ?

 If find the value of .

In a triangle ΔABC, the sides DE parallel to BC and AD = 6 cm, DB = 9 cm, AE = 8 cm, find the value of AC.

If the ratio of the measurements of the three angles of a triangle is 2: 3: 4, then the measurement of its largest angle is.

In an isosceles triangles ABC, AB=AC the median drawn on the same arms are perpendicular to each other find AB/BC?

If in a triangle, the orthocenter lies on vertex, then the triangle is 

In ΔABC, ∠C=90° and CD is perpendicular to AB at D. If AD/BD=, then AC/BC=?