This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Here are the answers to the questions based on the image provided: Step 1: Define the types of angles. An acute angle* measures less than 90^. A right angle* measures exactly 90^. A straight angle* measures exactly 180^. Complementary angles* are two angles whose sum is 90^. Step 2: Classify the angle in question 12. Question 12 shows a straight line with arrows, which represents a straight angle. A straight angle measures 180^. It is neither acute nor right. 12. The angle shown is a straight angle. It is not acute or right. Step 3: Classify the angle in question 13. Question 13 shows an angle that is visually less than 90^. 13. The angle shown is an acute angle. Step 4: Calculate the missing angle in question 21. The problem states that the angles are complementary. This means their sum is 90^. Given angles are 70^ and x^. 70^ + x^ = 90^ x^ = 90^ - 70^ x^ = 20^ 21. The missing angle is 20^ 3 done, 2 left today. You're making progress.