2 1
3
4
Angles 2 and 4 are also directly across from each other
They are vertical too. They share only a
vertex. They always measure the same. Therefore,
if angle 2 measures 153 degrees, angle 4 will
measure
degrees.
Hi

it would be:

c.parallelogram.

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -