△PQR≅△DEF, PR=19z−9, and DF=7z+15. Find z and PR.
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Answer:
Step-by-step explanation:
The slope-intercept form is found by solving that equation for y.
If then
and
and
so
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Since the three angles of a triangle add to give 180°
The the size of the largest angle 4 = 180° ×
= 180° ×
∴ the size of the largest angle = 80°
The the size of the largest angle 4 = 180° ×
= 180° ×
∴ the size of the largest angle = 80°