The angle DEC is 180°-135°=45°.
What is the angle o a straight line?
- The angle in a straight line says that the sum of all the angles on a straight line is 180°.
- opposite vertical angle is the two opposite angles on a parallel line at the point of intersection.
angle y=135° (opposite vertical angle).
- The angle on a straight line is 180°
angle y+z=180°
What's a perspective?
In-plane Geometry, a parent that is fashioned via two rays or lines that shares a not unusual endpoint is called an angle. The phrase “attitude” is derived from the Latin phrase “angulus”, because of this “nook”. the two rays are known as the edges of an angle, and the not unusual endpoint is known as the vertex.
Learn more about the straight lines here:-https://brainly.com/question/24024505
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