IM 8.1.16 Practice: Parallel Lines and the Angles in a Triangle

For each triangle, find the measure of the missing angle.

[size=150]Is there a triangle with two right angles? Explain your reasoning.[/size]

In this diagram, lines AB and CD are parallel.

[size=150]Angle [math]ABC[/math] measures [math]35^\circ[/math] and angle [math]BAC[/math] measures [math]115^\circ[/math].[br][br][size=100]What is [math]m\angle ACE?[/math][/size][/size]

What is [math]m\angle ACB?[/math]

Here is a diagram of triangle DEF.

Find the measures of angles [math]q[/math], [math]r[/math], and [math]s[/math].

Find the sum of the measures of angles [math]q[/math], [math]r[/math], and [math]s[/math].

What do you notice about these three angles?

The two figures are congruent. Label the points A',B' and C' that correspond to A, B, and C in the figure on the right.

If segment [math]AB[/math] measures 2 cm, how long is segment [math]A'B'[/math]? Explain.

The point [math]D[/math] is shown in addition to [math]A[/math] and [math]C[/math]. How can you find the point [math]D'[/math] that corresponds to [math]D[/math]? Explain your reasoning.

IM 8.1.16 Practice: Parallel Lines and the Angles in a Triangle

For each triangle, find the measure of the missing angle.

In this diagram, lines AB and CD are parallel.

Here is a diagram of triangle DEF.

The two figures are congruent. Label the points A',B' and C' that correspond to A, B, and C in the figure on the right.

Information: IM 8.1.16 Practice: Parallel Lines and the Angles in a Triangle