Fill in the blanks:-
2.16 A circle of diameter 4cm is congruent to a circle of radius ...……
2.17.........is the symbol of congruence.
9.18 In a/an ……...… triangle, the altitudes are different in length.
0.19 A median of a triangle …………… the side to which it is drawn.
.20 The best measure of central tendency is…………
Answers
Answer:
Let ABC be a triangle AH the height from A to BC and AM the median (M the midpoint between B and C) without loss of generality let's say that H is between B and M so we have ΔBAH and ΔMAH congruent as angles BHA and MHA are equal angle BAH and MAH are equal (per hypothesis of problem) and they share side AH. Therefore BM=HM(orHM=
2
1
BM)
So, Lets' see ΔAHC. AM is bisector therefore we have ratios
MC
MH
=
AC
AH
but MH=
2
1
MB=
2
1
MC
therefore
MC
MH
=
2
1
So AHC is a right angled triangle at H and AC=2AH. So, sinC=
2
1
and C=30
0
∠HAC=60
0
and ∠HAB=∠HAM=
2
1
∠HAC=30
0
So ∠BAC=90
0
So, ∠BAD=60
0
∠BAC=3×30
0
=90
0
.
Step-by-step explanation:
please mark brainlist
Answer:
2cm
= under ~
scalene
is not always perpendicular
Type of Variable Best measure of central tendency
Nominal Mode
Ordinal Median
Interval/Ratio (not skewed) Mean
Interval/Ratio (skewed) Median