# 11.4.2. The Cosine Rule

Given that is a triangle, where cm, cm, and , determine the value of , and approximate the result to the nearest thousandth.

- Acm
- Bcm
- Ccm
- Dcm

Determine the perimeter of the triangle to the nearest cm, given that cm, cm, and .

Show Solutionis a triangle, where cm, cm, cm, and , where cm. Determine the length of to the nearest hundredth.

- Acm
- Bcm
- Ccm
- Dcm

In triangle , if cm, cm and , find the perimeter of the triangle to the nearest centimetre.

Show SolutionDetermine the greatest angle of the triangle to the nearest second, given that .

- A
- B
- C
- D

Find, to the nearest second, the measure of the greatest angle of the triangle in which cm, cm, and cm.

- A
- B
- C
- D

is a triangle where cm, cm, and its perimeter equals cm. Determine the values of and .

- Acm, cm
- Bcm, cm
- Ccm, cm
- Dcm, cm

Given that is a triangle in which cm, cm, and the perimeter of the triangle is cm, determine the triangle’s greatest angle approximating the result to the nearest second.

- A
- B
- C
- D

Solve the triangle below approximating the lengths to the nearest centimetre and the measures of angles to the nearest second.

- Acm, ,
- Bcm, ,
- Ccm, ,
- Dcm, ,

Solve the triangle approximating the measures of angles to the nearest second.

- A, ,
- B, ,
- C, ,
- D, ,

Given that , , and are cities, determine the distance between the cities and to the nearest kilometre.

Show SolutionFind the area of the triangle to the nearest centimeters, given that cm, cm, and cm.

- A
- B
- C
- D