To find the missing angle you need to add the three known angles together. 115° + 100° + 100° = 315° The sum of all four angles in a quadrilateral is 360°.

National 5; Applying the properties of shapes to determine an angle Angle properties of polygons. Angles in a triangle add up to 180° and quadrilaterals add up to 360°. Angles can be calculated ...

image: Some of the study participants were shown one of the two doctor's offices above. The office on the left featured angular shapes and the office on the right had circular shapes.

If two 90 degree angles are placed back-to-back (Figure 5), they total 180 degrees. The sides of this angle form a straight line, so a 180 degree angle is a straight line. Adding two more 90 degree ...

Ohio State University. (2018, May 1). Curves or angles? Shapes in businesses affect customer response. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2018 / 05 ...