# Posts by adeny

Total # Posts: 4

**geometry**

Two chords that intersect within a circle form an angle whose measure is 55°. If this angle’s arc is 100°, what is the measure of the arc of its vertical angle?

**geometry**

In circle O, ∠AOB intercepts an arc whose measure is 50°. What is the measure of ∠AOB?

**geometry**

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?

**geometry**

The ratio of the areas of two similar triangles is 36 : 25. What is the ratio of the perimeters of the two triangles?