81.In figure, the side BC of a ∆ABC is produced to D. The bisector of ∠BAC intersects the side BC at E. Prove that ∠ABC + ∠ACD = 2 ∠AEC.
121 Views
82.The sides BA and DC of a quadrilateral ABCD are produced as shown in figure. Show that ∠x + ∠y = ∠a + ∠b
3484 Views
83.The degree measures of three angles of a triangle are x, y and z. If then find the value of z.
105 Views
84.
In figure, the sides AB and AC of ∆ABC are produced to points E and D respectively. If bisectors BO and CO of ∠CBE and ∠BCD respectively meet at point O, then prove that
393 Views
Advertisement
85.The angles of a triangle are 2x + 35, 3x - 5 and 5x - 50 degree. Find x.
94 Views
86.The sum of two angles of a triangle is 80° and the difference is 20°. Find all the angles of the triangle.
93 Views
87.In the given figure, if l || m, then find the value of x.
471 Views
88.In the figure, ∠X = 72°, ∠X ZY = 46°. If YO and ∠O are bisectors of ∠XYZ and ∠XZY respectively of ∆XYZ, find ∠OYZ and ∠YOZ.
108 Views
Advertisement
89.In figure, find the value of x.
259 Views
90.In figure, AB || DC, ∠BDC = 30° and ∠BAD = 80°, find ∠x, ∠y and ∠z.
Short Answer Type
then find the value of z.
