Lines & Angles

An angle measuring $90^{\circ }$ is called a ... angle.

An angle measuring $120^{\circ }$ is a ... angle.

The complement of a $30^{\circ }$ angle is ...

The supplement of a $70^{\circ }$ angle is ...

The sum of the interior angles of a triangle is ...

Two angles are complementary. If one of them is $50^{\circ }$, the other angle is ...

Lines $l\parallel m$ are cut by a transversal. If one angle is $65^{\circ }$, the corresponding angle is ...

Lines $l\parallel m$ are cut by a transversal. If an alternate interior angle is $70^{\circ }$, its alternate interior partner is ...

Lines $l\parallel m$ are cut by a transversal. If a co-interior angle is $110^{\circ }$, its co-interior partner is ...

A triangle has two angles of $50^{\circ }$ and $60^{\circ }$. The third angle is ...

A right triangle has one acute angle of $35^{\circ }$. The other acute angle is ...

An isosceles triangle has an apex angle of $40^{\circ }$. The measure of each base angle is ...

Two intersecting lines form vertically opposite angles. If one is $3x$ and the other is $120^{\circ }$, the value of $x$ is ...

Two supplementary angles measure $x$ and $2x$. The value of $x$ is ...

Lines $l\parallel m$ are cut by a transversal. Two alternate interior angles measure $(3x-20{)}^{\circ }$ and $(x+40{)}^{\circ }$. The value of $x$ is ...

The angles of a triangle are in the ratio $2:3:4$. The largest angle is ...

In a triangle, two interior angles are $50^{\circ }$ and $60^{\circ }$. The exterior angle at the third vertex is ...

Lines $l\parallel m$ are cut by a transversal. Two co-interior angles measure $(2x+10{)}^{\circ }$ and $(3x-30{)}^{\circ }$. The value of $x$ is ...

Two intersecting lines form supplementary angles $(x+30{)}^{\circ }$ and $(2x{)}^{\circ }$. The value of $x$ is ...

A right triangle has angles $x$, $2x$, and $90^{\circ }$. The smallest angle is ...