PP-T1-DS143

[smilego]

143. 14534-!-item-!-187;#058&010011
In the figure shown, the measure of angle PRS is how many degrees greater than the measure of angle PQR ?

(1) The measure of angle QPR is 30°
(2) The sum of the measures of angles PQR and PRQ is 150°

Ans:D

無法貼圖,可以請問,這題要怎樣求出答案呢? 謝謝

[小花]

PQR+QPR+RPS+90=180(三角形PQS)----------(1
PRS+RPS+90=180(三角形RPS)------------------(2
(2-(1
PRS-PQR-QRP=0
PRS-PQR=QRP

(1) QPR=30 充分
(2)QPR=180-150=30 充分