18.1 Closure

Quiz by Kristina Haley

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3 questions
• Q1
Consider the two triangles shown. If triangle ABC is similar to triangle FED, what is the value of x?
75°
55°
20°
130°
30s
• Q2
Suppose ∠ACB≅∠AED in the figure shown. Based on the figure and the given statement, which can prove that △ACB∼△AED?
AC is proportional to AE, and since two corresponding angles are congruent, △ACB∼△AED.
AB is proportional to AD, and since two corresponding angles are congruent, △ACB∼△AED.
m∠ABC=m∠ADE=80°, and since the three corresponding angles are congruent, △ACB∼△AED.
m∠ABC=m∠ADE=40°, and since the three corresponding angles are congruent, △ACB∼△AED.
30s
• Q3
Are all right isosceles triangles similar? Explain.
No! B/c we need to know all sides are proportional
Yes! B/c the triangles will be congruent.
Yes! B/c then the both triangles would have base angles of 45 and 45 (AA)
Yes! B/c of SSS
30s

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