Question

venation is the pattern of the veins in a leaf. some leaves have parallel venation. find the measure of the angles in the photo of the leaf.

Explanation:

Step1: Identify angle - relationship

Since the veins are parallel, the 80 - degree angle and angle 1 are corresponding angles. Corresponding angles formed by parallel lines are equal.
$\angle1 = 80^{\circ}$

Step2: Find angle 2

Angle 1 and angle 2 are supplementary (a linear - pair of angles). The sum of angles in a linear pair is 180 degrees. So, $\angle2=180^{\circ}-\angle1$.
$\angle2 = 180^{\circ}-80^{\circ}=100^{\circ}$

Answer:

$\angle1 = 80^{\circ}$, $\angle2 = 100^{\circ}$