IM 8.1.14 Practice: Alternate Interior Angles

Use the diagram to find the measure of each angle.
[math]m\angle ABC[/math] = ?
[math]m\angle EBD[/math] = ?
[math]m\angle ABE[/math] = ?
Lines k and l are parallel, and the measure of angle ABC is 19 degrees.
Explain why the measure of angle [math]ECF[/math] is 19 degrees. If you get stuck, consider using the applet to translate line [math]\ell[/math] by moving [math]B[/math] to [math]C[/math].
What is the measure of angle [math]BCD[/math]? Explain.
The diagram shows three lines with some marked angle measures. Find the missing angle measures marked with question marks.
Lines s and t are parallel. Find the value of x.
The two figures are scaled copies of each other.
The two figures are scaled copies of each other.
What is the scale factor that takes Figure 1 to Figure 2?
What is the scale factor that takes Figure 2 to Figure 1?
Luk
– GeoGebra Classroom Activities, IM 6 – 8 Math

Information: IM 8.1.14 Practice: Alternate Interior Angles