Saturday

December 20, 2014

December 20, 2014

Posted by **lindsay** on Saturday, April 21, 2012 at 5:18pm.

1. the size of the largest angle

2. the area of the triangle

- trigonometry -
**Reiny**, Saturday, April 21, 2012 at 5:24pm1.

the largest angle is opposite the largest side, so set your cosine equation up this way:

9^2 = 7^2 + 8^2 - 2(7)(8)cosŲ

2.

once you have that angles use the area formula

area = (1/2)(a)(b)sinŲ , where Ų is the contained angle.

**Answer this Question**

**Related Questions**

trigonometry - In the triangle ABC, the sides AB and BC have lengths 7cm and 8cm...

9th grade - given that a(-1,8) ,b(2,4) and if the line y=4 is the axis of ...

Geometry - Can a triangle have sides with the given lengths? Explain. 15) 8cm, ...

algrbra/trigonometry - in triangle ABC, angle a=120, b=10, and c=18. What is the...

Trigonometry - Triangle ABC is a right triangle with right angle at C. CD is ...

Trigonometry - a diagram shows a cross section of a triangular prism. AB=BC=7cm...

Engineering - Triangle ABD in the diagram has a right angle A and sides AD = 4....

math - Triangle ABD in the diagram has a right angle A and sides AD = 4.9cm and ...

Math(Geometry) - In the diagram below(no diagram but details will be provided), ...

math - AB = 8 cm, AC = 6 cm, AD = 7 cm, CD = 2.82 and CAB=50°. Calculate to 2 ...