Question

Triangle R S T is shown. The length of R S is 9, the length of S T is 8, and the length of R T is s. Angle R S T is 111 degrees. Law of cosines: a2 = b2 + c2 – 2bccos(A) What is the value of s to the nearest whole number? 10 12 13 14

Answer 1

Answer:

bro I think its 14

Step-by-step explanation:

si paps

Answer 2

The length of RT is 14 cm. Therefore, option D is the correct answer.

Given that, RS=9, ST=8, RT=s and ∠RST=111°.

How do you solve cosine rules?

The cosine formula to find the side of the triangle is given by: c = √[a²+ b²– 2ab cos C] Where a,b and c are the sides of the triangle.

Here, given a²= b²+ c²– 2bc cos A.

s²= 9²+ 8²– 2×9×8 cos111°

⇒s²=81+64+51.552

⇒s²=197.552

⇒s=14.05≈14 cm

Therefore, option D is the correct answer.

To learn more about cosine rule visit:

https://brainly.com/question/20839703.

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