Q22 of 58 Page 18

In Fig. 17.28, ABCD and AEFG are parallelograms. If ∠C =55°, what is the measure of ∠F? Figure

In parallelogram ABCD


∠C =∠A = 55° [In a parallelogram opposite angles are equal]


In parallelogram AEFG


∠A =∠F = 55° [In a parallelogram opposite angles are equal]


More from this chapter

All 58 →
20

Find the angles marked with a question mark shown in Fig. 17.27

 21

The angle between the altitudes of a parallelogram, through the same vertex of an obtuse angle of the parallelogram is 60°. Find the angles of the parallelogram.

 23

In Fig. 17.29, BDEF and DCEF are each a parallelogram. Is it true that BD=DC? Why or why not?

 24

In Fig. 17.29, suppose it is known that DE = DF. Then, is ΔABC isosceles? Why or why not?