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# Geometry Practice: Angles and Triangles Quiz

### 1. What is the sum of the interior angles of a triangle?

### 2. Which of the following statements is true for an equilateral triangle?

### 3. If one angle of a right triangle measures 45 degrees, what is the measure of the other acute angle?

### 4. In an isosceles triangle, if one of the angles measures 100 degrees, what is the measure of one of the other angles?

### 5. What is the exterior angle theorem?

### 6. Which of the following triangles is always acute?

### 7. In a 45-45-90 triangle, what is the ratio of the lengths of the sides?

### 8. How many degrees are in the sum of the exterior angles, one at each vertex, of a triangle?

### 9. If two angles of a triangle measure 35 degrees and 45 degrees, what is the measure of the third angle?

### 10. Which type of triangle has one angle that measures more than 90 degrees?