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Progress Check
1. Write the overall summary
overall summary chemical
equation of photosynthesis.
2. Which single substance in the above
equation is repeated in raw material as well
as reproduced as an end product?
3. What is the source of oxygen released in
photosynthesis CO, or H,O?
4. What happens in photolysis?
5. Dark reaction involves utilisation of Co, in
producing CH, O. (glucose). Why is this
phase called dark reaction ?
6. Glucose produced during photosynthesis is
soon polymerised into starch. What does
polymerisation mean?
7. Why is it better to call the dark phase of
photosynthesis as "light-independent phase"?
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Answer:
BD=6.2 cm
Step-by-step explanation:
In triangle ABC
Angle B=90 degree
AB=6 cm
BC=8 cm
D is the mid-point of AC.
In triangle ABC
AC^2=AB^2+BC^2AC
2
=AB
2
+BC
2
Using Pythagoras theorem
(hypotenuse)^2=(Base)^2+(perpendicular\;side)^2(hypotenuse)
2
=(Base)
2
+(perpendicularside)
2
AC^2=6^2+8^2AC
2
=6
2
+8
2
AC^2=36+64AC
2
=36+64
AC^2=100AC
2
=100
AC=\sqrt{100}=10 cmAC=
100
=10cm
AD=DC=\frac{1}{2}AC=\frac{1}{2}(10)=5 cm
2
1
AC=
2
1
(10)=5cm
We know that when a line is drawn from vertex and divide the opposite side into equal parts then, it will be perpendicular .
In right triangle DBC
BC^2=DB^2+DC^2BC
2
=DB
2
+DC
2
Substitute the values
8^2=DB^2+5^28
2
=DB
2
+5
2
64=DB^2+2564=DB
2
+25
DB^2=64-25=39DB
2
=64−25=39
DB=\sqrt{39}=6.2 cmDB=
39
=6.2cm
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