Solve the system by elimination. -x-18y=-3 7x-9y=21
1 answer:
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The answers are:
a = c
c = d
b + d =180 degrees
Here's how:
When a line intersects two parallel lines, then corresponding angles are formed which means the same corners are congruent.
option c = d is considered.
And, because of vertical angles,
a = d is also an answer.
Below is an attached picture of the figure
a = c
c = d
b + d =180 degrees
Here's how:
When a line intersects two parallel lines, then corresponding angles are formed which means the same corners are congruent.
option c = d is considered.
And, because of vertical angles,
a = d is also an answer.
Below is an attached picture of the figure