Question

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Answer 1

Answer:

19.The correct answer is option a......

20. The correct answer is option c......

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Answer 2

Step-by-step explanation:

a) Therefore, the complement of the angle 90° is the angle y, such that 90° + y = 90°. We can solve this for y to find the complement of a 90° angle. Subtract 90° from both sides of the equation. We get y = 0°, so the complement of a 90° angle is 0°.

b) In geometry, an equilateral triangle is a triangle in which all three sides are equal. In the familiar Euclidean geometry, an equilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.

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