1. Find the area of the triangle, given that the length of the base is 15 cm and the height is 7 cm.

Answer: Area = (15 cm * 7 cm)/2 = 52.5 cm²

2. Find the equation of the line connecting point A (4,6) and point B (10,8):

Answer: Equation of the line connecting A and B is y = 2x - 2.

3. Given the circle with center O and a point P lying outside of it, as shown in the figure below. What is the length of the OP?

Answer: Length of OP = 8 cm.

4. What is the circumference of a circle with radius 4?

Answer: Circumference of a circle with radius 4 = 2π x 4 = 25.13 cm.

5. Find the angle between the lines with equations y = 2x + 3 and 3x + 2y = 5.

Answer: The angle between the lines is 72.4°.