##### 几何工具: 基础能力测试

LIVE课程将用最简单的语言将最复杂的数学概念去芜存菁。在开始上课前，让我们来确认你已经掌握了我们将在本课程中使用的基本概念。如果您在此测试中答出 80%以上的题目，同时在 place-out test 中得到低于 70%的分数，那么就从这个模块开始学习吧！ 这个测试对你来说应该很容易，因为它只是基础能力测试。

10:00

1.

What is this shape called?

Kite

Parallelogram

Rhombus

Tetrahedron

Trapezoid

2.

These two lines are perpendicular. How many degrees are in the marked angle?

$$25^\circ$$

$$75^\circ$$

$$90^\circ$$

$$270^\circ$$

$$365^\circ$$

3.

What is the area of this triangle?

$$14$$

$$20$$

$$40$$

$$4 \sqrt{10}$$

$$\sqrt{4^2 + 10^2}$$

4.

What is the length of the hypotenuse of this right triangle?

$$3$$

$$\displaystyle \frac{20}{3}$$

$$\sqrt{41}$$

$$2 \sqrt{20}$$

$$\sqrt{4} + \sqrt{5}$$

5.

Line segment $$AC$$ has length $$120,$$ and point $$B$$ splits it into two parts, where $$AB$$ is $$\frac{2}{3}$$ as long as $$BC.$$ How long is $$AB?$$

$$36$$

$$40$$

$$48$$

$$60$$

$$80$$

6.

A circle has area $$9.$$ What is its circumference?

$$9 \pi$$

$$18 \pi$$

$$81 \pi$$

$$9 \pi^2$$

$$6 \sqrt{\pi}$$