Basic Mathematics
# Angles and Lines

**false**?

**true** about the yellow and purple angles?

$\angle a = 53^\circ$ and $\angle b = 37^\circ$, which of the following statements are true:

Given thatI) $l$ and $m$ are perpendicular.

II) $l$ and $n$ are perpendicular.

III) None of the lines in this diagram are perpendicular.

$l \perp m$ and $n \perp p$ and $\angle a = 31^\circ$, what is the measure of $\angle b$ in degrees?

IfWhat is the angle measure (in degrees) between 2 perpendicular lines?