Question

Answer 1

a/Xét \(\Delta IRQ\) và \(\Delta IST\) có:
\(IR=IS\left(gt\right)\)
\(IQ=IT\left(gt\right)\)
\(RQ=ST\left(gt\right)\)
\(\Rightarrow\Delta IRQ=\Delta IST\left(c.c.c\right)\)
b/Xét \(\Delta IMR\) và \(\Delta IMS\) có:
\(IM\) chung
\(IR=IS\left(gt\right)\)
\(MR=MS\left(gt\right)\)
\(\Rightarrow\Delta IMR=\Delta IMS\left(c.c.c\right)\)
c/\(MQ=MR+RQ\)
\(MT=MS+ST\)
Mà \(MR=MS\left(gt\right)\)
      \(RQ=ST\left(gt\right)\)
\(\Rightarrow MQ=MT\)
Xét \(\Delta IMQ\) và \(\Delta IMT\) có:
\(IM\) chung
\(IQ=IT\left(gt\right)\)
\(MQ=MT\left(cmt\right)\)
\(\Rightarrow\Delta IMQ=\Delta IMT\left(c.c.c\right)\)