Question

answer please??????
$angle \: ptq$

Answer 1

very easy try yourself

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soln.

ray PT and ray QT are the bisector of angle BPQ and angle PQD resp

therefore, Angle BPT=angle QPT
and angle PQT=angle DQT

let angle BPT=QPT=X
and angle PQT=DQT=y
now,
BPQ+DQP=180°. (interior angle Therom)
but angle BPQ=2x and DQP=2y

therefore 2x+2y=180°
2(X+y)=180°
X+y=180/2
x+y=90°. -(i)
THEREFORE, QPT+PQT=90° -(ii)
therefore in triangle PTQ
PTQ+PQT+QPT=180°.-(sum of angles of a triangle is 180°)
therefore QPT+PQT+PTQ=180
therefore, 90+PTQ=180° -(from ii)
therefore angle PTQ=180-90
therefore, PTQ =90°

thanks

Answer 2

Step-by-step explanation:

Pure calcium carbonate can be produced from marble, or it can be prepared by passing carbon dioxide into a solution of calcium hydroxide. In the later case calcium carbonate is derived from the mixture, forming a grade of product called "precipitated calcium carbonate,” or PCC.