Physics, 29.08.2019 01:40 Kyliehayden05

Susan notices that ac and df are congruent in the image below. which step could her determine if _abc _ _def by sas?

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Answer from: avilaaa

D due to SAS (Side Angle Side)... Though B and D may seem like the same thing, in congruence, if you have something like ΔABC ≅ ΔDEF. A matches with D, B matches with E, and C matches with F. Let's try B with this. "segment CA ≅ segment DF" C matches with F and A matches with D. So, the order matters. We have CA congruent to FD. Oops! This doesn't match due to the fact that it says DF instead of FD. However, D matches that. It also works, because you know that BC and EF are congruent and angles C and F are congruent. This makes sides congruent, then angles congruent in the middle, then sides congruent again. Hence Side Angle Side or SAS. A and C don't work, because they don't make AAS, SAS, or SSS. I hope that helps. :D

Answer from: Quest

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

Answer from: Quest

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

$_a^z\textrm{x}\rightarrow _{a-2}^{z-4}+_2^4\alpha$

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

$_a^z\textrm{x}+_{-1}^0\textrm{e}\rightarrow _{z-1}^a\textrm{y}$

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases $\gamma -radiations$ . this process does not change the mass number.

$_a^z\textrm{x}^*\rightarrow _a^z\textrm{x}+_0^0\gamma$

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as $\beta ^+$ -decay. in this the mass number remains same.

$_a^z\textrm{x}\rightarrow _{z-1}^a\textrm{y}+_{+1}^0e$

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

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Susan notices that ac and df are congruent in the image below. which step could her determine if _a...