In ∆DEF, ∠D = 60°, ∠E = 70° and
the bisectors of ∠E and ∠F meet
at O. Find (i) ∠F (ii) ∠EOF
If one angle of a triangle is 60° and the other two angles are in the
ratio 1 : 2, find the angles.
The angles of a triangle are arranged in descending order of their
magnitudes. If the difference between two consecutive angles is 10°,
find the three angles.
If the sides of a triangle are produced in an order, show that the sum of the exterior angles so formed is 360°.
Each of the two equal angles of
an isosceles triangle is four times
the third angle. Find the angles
of the triangle.
In a right-angled triangle if an angle measures 35°, then find the measure of the third angle