Polygon with three sides, three angles, and three vertices. Based on the properties of each side, the types of triangles are scalene (triangle with three three different lengths and three different angles), isosceles (angle with two equal sides and two equal angles), and equilateral (three equal sides and three angles of 60°). The types of angles are acute (less than 90°); obtuse (greater than 90°); and right (90°).
Chapter 6.1, Problem 23E
To determine
(a)
To Explain:
Consider a circle or congruent circle, the statement congruent arcs have congruent central angles is true.
To determine
(b)
To explain:
Consider a circle or congruent circle, the statement congruent central angles have congruent arcs is true.
To determine
(c)
To explain:
Consider a circle or congruent circle, the statement congruent chords have congruent arcs is true.
To determine
(d)
To explain:
Consider a circle or congruent circle, the statement congruent arcs have congruent chords is true.
To determine
(e)
To explain:
Consider a circle or congruent circle, the statement congruent central angles have congruent chords is true.
To determine
(f)
To explain:
Consider a circle or congruent circle, the statement congruent chords have congruent central angles is true.
Mariela is in her classroom and looking out of a window at a tree, which is 20 feet away. Mariela’s line of sight to the top of the tree creates a 42° angle of elevation, and her line of sight to the base of the tree creates a 31° angle of depression.
What is the height of the tree, rounded to the nearest foot? Be sure to show your work to explain how you got your answer.
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