# Mathematics

PQRS is a quadrilateral, PQ=7cm, QR=8cm and PR=7.5cm. (a) Calculate angle PSR (b) Hence if SR=SP, calculate angle SPR

1. 👍 0
2. 👎 0
3. 👁 123
1. In triangle PQR, use the law of cosines to determine the angles.
Unfortunately, just knowing that triangle PSR is isocseles tells you nothing about its other sides or angles.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### maths

A triangle has sides 8cm and 5cm and an angle of 90 degrees between them. Calculate the smallest angle of the triangle.

asked by bashiru on May 21, 2017
2. ### math

Calculate the volume of a steel bar which is 8cm long and 3.5cm in diameter

asked by Margret on February 19, 2017
3. ### math

a triangle has sides 8cm and 5cm and an angle of 90 between them. calculate the smallest angle of the triangle

asked by Anonymous on April 24, 2016
4. ### Mathematics

Construct a paralelogram /PQRS/ Such that /PQ/=9.5cm,/PQR/=105,diagonal/PR/=12cm,measure circle/QR/

asked by Sulaimon on July 28, 2020
1. ### Maths

The total surface area of a rectangular solid is 130cm, if the solid is 7cm long and 5cm wide. Calculate the height

asked by Samuel on February 7, 2019
2. ### Mathematics

If a figure shows a cylindrical casting of height 8cm and external and internal diameters 9cm and 5cm respectively. Calculate the volume of metal in the casting

asked by Precious on July 13, 2020
3. ### Math

Construct triangle ABC in which/AB/=7cm,/AC/=9.5cm and B angle A C=120degree. Measure/BC/

asked by Dorcas on June 19, 2018
4. ### Math

A quadrilateral contains two equal sides measuring 12 cm each with an included right angle. If the measure of the third side is 8 cm and the angle opposite the right angle is 120 degrees, find the fourth side and the area of the

asked by Karen on February 2, 2015
1. ### math

using a ruler and a pair of compass only construct a quadrilateral PQRS, given that PQ=5 CM, angle PQS=30 degree, angle QPS=105 degree, PR=9 cm and RS=RQ.measure angle QRS and RS -

asked by david omo on February 27, 2014
2. ### Mathematics.

Mathematics Calculate the volume of a cylindrical steel bar which is 8cm long and 3.5cm in diameter

asked by Chukwuma on June 29, 2020
3. ### mathematics

In ∆PQR p= 1.8cm, q = 2.5cm, r = 3.6cm,calculate p.

asked by olufunmi on May 30, 2020
4. ### trigonometry

given triangle ABC with AB=7cm, BC=8cm and AC=9cm calculate 1. the size of the largest angle 2. the area of the triangle

asked by lindsay on April 21, 2012