If the ratio of the heights of two identical triangles is 4: 9, find the ratio of the areas of the two triangles.

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.

The Median of an isosceles triangle ΔABC is AD and ∠A = 110 °, AB = AC, find the value of ∠ADB.

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

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.

If the ratio of the measurement of the four angles of a quadrilateral is 1: 2: 3: 4, then the measurement of its smallest angle is-

If one angle is half of its complementary angle, find that angle.

(2x + 4) and (x - 1) are the angle pairs of angles of measurement, then their measurement will be