Two chords that intersect within a circle form an angle whose measure is 55°. If this angles arc is 100°, what is the measure of the arc of its vertical angle?
In circle O, ∠AOB intercepts an arc whose measure is 50°. What is the measure of ∠AOB?
The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle?
The ratio of the areas of two similar triangles is 36 : 25. What is the ratio of the perimeters of the two triangles?
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