In the triangle RST the measure of ZRST is 109°, and the measure of ZSTR is 28°.
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Sa= bw+hw+lw+
(2)
SA=(12*4)+(16*4)+(20*4)+(
)
SA= 28+64+80+(6*16*2)
SA=28+64+80+(96*2)
SA=28+64+80+192
SA=364
SA=(12*4)+(16*4)+(20*4)+(
SA= 28+64+80+(6*16*2)
SA=28+64+80+(96*2)
SA=28+64+80+192
SA=364