17. In the figure below, what is BD?

a. diameter
b. chord
c. radius
d. side

18. BD is 10 cm, what is the measure of RD of?

a. 20 cm

b. 30cm

c. 40 cm

d. 50 cm

19.Polygons are classified according to the number of sides. What do you call a polygon with 6 sides?

a. decagon

b. hexagon

c. octagon

d. heptagon

20. What is the value of the 6th angle of a hexagon with 122, 123,124, 125, 126,

a. 100

b. 102

c. 105

d. 120​​