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mhanifa

Answer:

True choices are 1, 2, 5

Step-by-step explanation:

As per diagram, the circles are equal.

Since the distance AB is the radius of both circles:

  • AB = AC = BC = BD = AD = r

So the answer choices:

1. AC = BC

  • Correct, both equal to r

2. AC = BD

  • Correct, both equal to r

3. CD = AB

  • Incorrect. Half of CD is the leg of 30-60-90 triangle and is equal to  r√3/2, so CD = AB√3

4. ABCD is a square

  • Incorrect. ACBD is rhombus

5. ABD is an equilateral triangle

  • Correct, all three sides are equal to r

6. CD = AB + AB

  • Incorrect as CD = AB√3
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