##### Asked by: Nikki Penning

asked in category: General Last Updated: 17th June, 2020# What is a tangential arc?

**tangent arc**. : a halo that touches a circular halo.

Just so, how do you construct a tangential arc?

**Draw** a line connecting the point to the center of the circle. **Construct** the perpendicular bisector of that line. Place the compass on the midpoint, adjust its length to reach the end point, and **draw** an **arc** across the circle. Where the **arc** crosses the circle will be the **tangent** points.

One may also ask, how do you draw an arc with a compass? **Compass**

- make sure that the hinge at the top of the compass is tightened so that it does not slip.
- tighten the hold for the pencil so it also does not slip.
- align the pencil lead with the compass's needle.
- press down the needle and turn the knob at the top of the compass to draw a circle (or arc)

In this way, how many ways can an arc be tangent to one line?

Two non-parallel **lines can** have only **one tangent** on each **line** using an **arc** of a specific radii. If there is a specific **arc** size, there **can** be as **many** as two **ways** the **arc can** be **tangent** to the **line**. Finally, an **arc** of a specific radii **can** be **tangent** to two other **arcs** in two places on each **arc**.

How do you construct an arc?

**Constructing Angles of 60º, 120º, 30º and 90º**

- Step 1: Draw the arm PQ.
- Step 2: Place the point of the compass at P and draw an arc that passes through Q.
- Step 3: Place the point of the compass at Q and draw an arc that passes through P. Let this arc cut the arc drawn in Step 2 at R.