Answer:
-2/15
Step-by-step explanation:
Generally, if two things are the same, then it is called equivalent. the equivalent expressions are the expressions that are the same, even though the expression looks different.
we can see -
2/3-4/5= -2/15
and
-2/15 = 2/3-4/5
Answer:
The proof is explained below.
Step-by-step explanation:
Given m∠ADB = m∠CDB and AD ≅ DC
we have to prove that m∠BAC = m∠BCA and BD⊥ AC
In ΔADO and ΔCDO
∠OAD=∠OCD (∵ADC is an isosceles triangle)
AD=DC (∵Given)
∠ADO=∠CDO (∵Given)
By ASA rule, ΔADO≅ΔCDO
In ΔBAD and ΔBCD
AD=DC (∵ABC is an isosceles triangle)
∠ADB=∠CDB (∵Given)
DB=DB (∵common)
By ASA rule, ΔADB≅ΔCDB
Now, ΔADB≅ΔCDB and ΔADO≅ΔCDO
⇒ ΔADB-ΔADO≅ΔCDB-ΔCDO
⇒ ΔABO≅ΔCBO
Hence, by CPCT, m∠BAC = m∠BCA
Now, we have to prove that BD⊥ AC i.e we have to prove m∠BOA=90°
Now, ΔABO≅ΔCBO therefore by CPCT, m∠BOA = m∠BOC
But, m∠BOA + m∠BOC=180° (linear pair)
⇒ m∠BOA + m∠BOA=180°
⇒ 2m∠BOA=180° ⇒ m∠BOA=90°
Hence, BD⊥ AC
Answer:
Trapezoid
Step-by-step explanation:
Note that the bases (top horizontal line segment and the bottom horizontal line segment) are <em>parallel</em> while the sides are congruent.
~
Answer:
3.86 hours equation km/70=h
Step-by-step explanation:
We know that the bus started 300 km away from Orlando, and now it is 30 km away from Orlando. 300-30=270
We also know that the bus is driving 70 km per hour
In order to find how long it has taken the bus to travel the 270 km you need to divide 270 by 70.
300-30=270
270 divided by 70= 3.86 hours
The equation would be km/70=h
Answer:
44°
Step-by-step explanation:
m∠MKN=44° (sum of angles in a triangle)
m∠KMJ=44° (definition of congruent angles)